diff --git a/rhodecode/public/js/mode/meta_ext.js b/rhodecode/public/js/mode/meta_ext.js
new file mode 100644
--- /dev/null
+++ b/rhodecode/public/js/mode/meta_ext.js
@@ -0,0 +1,227 @@
+MIME_TO_EXT = {
+ 'application/javascript': ['*.js'],
+ 'text/javascript': ['*.js'],
+ 'application/json': ['*.json'],
+ 'application/postscript': ['*.ps', '*.eps'],
+ 'application/x-actionscript': ['*.as'],
+ 'application/x-actionscript3': ['*.as'],
+ 'application/x-awk': ['*.awk'],
+ 'application/x-befunge': ['*.befunge'],
+ 'application/x-brainfuck': ['*.bf', '*.b'],
+ 'application/x-cheetah': ['*.tmpl', '*.spt'],
+ 'application/x-coldfusion': ['*.cfm', '*.cfml', '*.cfc'],
+ 'application/x-csh': ['*.tcsh', '*.csh'],
+ 'application/x-dos-batch': ['*.bat', '*.cmd'],
+ 'application/x-ecl': ['*.ecl'],
+ 'application/x-evoque': ['*.evoque'],
+ 'application/x-fantom': ['*.fan'],
+ 'application/x-genshi': ['*.kid'],
+ 'application/x-gettext': ['*.pot', '*.po'],
+ 'application/x-jsp': ['*.jsp'],
+ 'application/x-mako': ['*.mao'],
+ 'application/x-mason': ['*.m', '*.mhtml', '*.mc', '*.mi', 'autohandler', 'dhandler'],
+ 'application/x-myghty': ['*.myt', 'autodelegate'],
+ 'application/x-php': ['*.phtml'],
+ 'application/x-pypylog': ['*.pypylog'],
+ 'application/x-qml': ['*.qml'],
+ 'application/x-sh': ['*.sh', '*.ksh', '*.bash', '*.ebuild', '*.eclass', '.bashrc', 'bashrc', '.bash_*', 'bash_*'],
+ 'application/x-sh-session': ['*.shell-session'],
+ 'application/x-shell-session': ['*.sh-session'],
+ 'application/x-smarty': ['*.tpl'],
+ 'application/x-ssp': ['*.ssp'],
+ 'application/x-troff': ['*.[1234567]', '*.man'],
+ 'application/x-urbiscript': ['*.u'],
+ 'application/xml+evoque': ['*.xml'],
+ 'application/xml-dtd': ['*.dtd'],
+ 'application/xsl+xml': ['*.xsl', '*.xslt', '*.xpl'],
+ 'text/S-plus': ['*.S', '*.R', '.Rhistory', '.Rprofile'],
+ 'text/coffeescript': ['*.coffee'],
+ 'text/css': ['*.css'],
+ 'text/haxe': ['*.hx'],
+ 'text/html': ['*.html', '*.htm', '*.xhtml', '*.xslt'],
+ 'text/html+evoque': ['*.html'],
+ 'text/html+ruby': ['*.rhtml'],
+ 'text/idl': ['*.pro'],
+ 'text/livescript': ['*.ls'],
+ 'text/matlab': ['*.m'],
+ 'text/octave': ['*.m'],
+ 'text/plain': ['*.txt'],
+ 'text/scilab': ['*.sci', '*.sce', '*.tst'],
+ 'text/smali': ['*.smali'],
+ 'text/x-abap': ['*.abap'],
+ 'text/x-ada': ['*.adb', '*.ads', '*.ada'],
+ 'text/x-apacheconf': ['.htaccess', 'apache.conf', 'apache2.conf'],
+ 'text/x-aspectj': ['*.aj'],
+ 'text/x-asymptote': ['*.asy'],
+ 'text/x-autohotkey': ['*.ahk', '*.ahkl'],
+ 'text/x-autoit': ['*.au3'],
+ 'text/x-bmx': ['*.bmx'],
+ 'text/x-boo': ['*.boo'],
+ 'text/x-c++hdr': ['*.cpp', '*.hpp', '*.c++', '*.h++', '*.cc', '*.hh', '*.cxx', '*.hxx', '*.C', '*.H', '*.cp','*.CPP'],
+ 'text/x-c-objdump': ['*.c-objdump'],
+ 'text/x-ceylon': ['*.ceylon'],
+ 'text/x-chdr': ['*.c', '*.h', '*.idc'],
+ 'text/x-clojure': ['*.clj'],
+ 'text/x-cmake': ['*.cmake', 'CMakeLists.txt'],
+ 'text/x-cobol': ['*.cob', '*.COB', '*.cpy', '*.CPY'],
+ 'text/x-common-lisp': ['*.cl', '*.lisp', '*.el'],
+ 'text/x-coq': ['*.v'],
+ 'text/x-cpp-objdump': ['*.cpp-objdump', '*.c++-objdump', '*.cxx-objdump'],
+ 'text/x-crocsrc': ['*.croc'],
+ 'text/x-csharp': ['*.cs'],
+ 'text/x-cuda': ['*.cu', '*.cuh'],
+ 'text/x-cython': ['*.pyx', '*.pxd', '*.pxi'],
+ 'text/x-d-objdump': ['*.d-objdump'],
+ 'text/x-dart': ['*.dart'],
+ 'text/x-dg': ['*.dg'],
+ 'text/x-diff': ['*.diff', '*.patch'],
+ 'text/x-dsrc': ['*.d', '*.di'],
+ 'text/x-duel': ['*.duel', '*.jbst'],
+ 'text/x-dylan': ['*.dylan', '*.dyl', '*.intr'],
+ 'text/x-dylan-console': ['*.dylan-console'],
+ 'text/x-dylan-lid': ['*.lid', '*.hdp'],
+ 'text/x-echdr': ['*.ec', '*.eh'],
+ 'text/x-elixir': ['*.ex', '*.exs'],
+ 'text/x-erl-shellsession': ['*.erl-sh'],
+ 'text/x-erlang': ['*.erl', '*.hrl', '*.es', '*.escript'],
+ 'text/x-factor': ['*.factor'],
+ 'text/x-fancysrc': ['*.fy', '*.fancypack'],
+ 'text/x-felix': ['*.flx', '*.flxh'],
+ 'text/x-fortran': ['*.f', '*.f90', '*.F', '*.F90'],
+ 'text/x-fsharp': ['*.fs', '*.fsi'],
+ 'text/x-gas': ['*.s', '*.S'],
+ 'text/x-gherkin': ['*.feature'],
+ 'text/x-glslsrc': ['*.vert', '*.frag', '*.geo'],
+ 'text/x-gnuplot': ['*.plot', '*.plt'],
+ 'text/x-gooddata-cl': ['*.gdc'],
+ 'text/x-gooddata-maql': ['*.maql'],
+ 'text/x-gosrc': ['*.go'],
+ 'text/x-gosu': ['*.gs', '*.gsx', '*.gsp', '*.vark'],
+ 'text/x-gosu-template': ['*.gst'],
+ 'text/x-groovy': ['*.groovy'],
+ 'text/x-haml': ['*.haml'],
+ 'text/x-haskell': ['*.hs'],
+ 'text/x-hybris': ['*.hy', '*.hyb'],
+ 'text/x-ini': ['*.ini', '*.cfg'],
+ 'text/x-iokesrc': ['*.ik'],
+ 'text/x-iosrc': ['*.io'],
+ 'text/x-irclog': ['*.weechatlog'],
+ 'text/x-jade': ['*.jade'],
+ 'text/x-java': ['*.java'],
+ 'text/x-java-properties': ['*.properties'],
+ 'text/x-julia': ['*.jl'],
+ 'text/x-kconfig': ['Kconfig', '*Config.in*', 'external.in*', 'standard-modules.in'],
+ 'text/x-koka': ['*.kk', '*.kki'],
+ 'text/x-kotlin': ['*.kt'],
+ 'text/x-lasso': ['*.lasso', '*.lasso[89]'],
+ 'text/x-literate-haskell': ['*.lhs'],
+ 'text/x-llvm': ['*.ll'],
+ 'text/x-logos': ['*.x', '*.xi', '*.xm', '*.xmi'],
+ 'text/x-logtalk': ['*.lgt'],
+ 'text/x-lua': ['*.lua', '*.wlua'],
+ 'text/x-makefile': ['*.mak', 'Makefile', 'makefile', 'Makefile.*', 'GNUmakefile'],
+ 'text/x-minidsrc': ['*.md'],
+ 'text/x-markdown': ['*.md'],
+ 'text/x-modelica': ['*.mo'],
+ 'text/x-modula2': ['*.def', '*.mod'],
+ 'text/x-monkey': ['*.monkey'],
+ 'text/x-moocode': ['*.moo'],
+ 'text/x-moonscript': ['*.moon'],
+ 'text/x-nasm': ['*.asm', '*.ASM'],
+ 'text/x-nemerle': ['*.n'],
+ 'text/x-newlisp': ['*.lsp', '*.nl'],
+ 'text/x-newspeak': ['*.ns2'],
+ 'text/x-nimrod': ['*.nim', '*.nimrod'],
+ 'text/x-nsis': ['*.nsi', '*.nsh'],
+ 'text/x-objdump': ['*.objdump'],
+ 'text/x-objective-c': ['*.m', '*.h'],
+ 'text/x-objective-c++': ['*.mm', '*.hh'],
+ 'text/x-objective-j': ['*.j'],
+ 'text/x-ocaml': ['*.ml', '*.mli', '*.mll', '*.mly'],
+ 'text/x-ooc': ['*.ooc'],
+ 'text/x-opa': ['*.opa'],
+ 'text/x-openedge': ['*.p', '*.cls'],
+ 'text/x-pascal': ['*.pas'],
+ 'text/x-perl': ['*.pl', '*.pm'],
+ 'text/x-php': ['*.php', '*.php[345]', '*.inc'],
+ 'text/x-povray': ['*.pov', '*.inc'],
+ 'text/x-powershell': ['*.ps1'],
+ 'text/x-prolog': ['*.prolog', '*.pro', '*.pl'],
+ 'text/x-python': ['*.py', '*.pyw', '*.sc', 'SConstruct', 'SConscript', '*.tac', '*.sage'],
+ 'text/x-python-traceback': ['*.pytb'],
+ 'text/x-python3-traceback': ['*.py3tb'],
+ 'text/x-r-doc': ['*.Rd'],
+ 'text/x-racket': ['*.rkt', '*.rktl'],
+ 'text/x-rebol': ['*.r', '*.r3'],
+ 'text/x-robotframework': ['*.txt', '*.robot'],
+ 'text/x-rpm-spec': ['*.spec'],
+ 'text/x-rst': ['*.rst', '*.rest'],
+ 'text/x-ruby': ['*.rb', '*.rbw', 'Rakefile', '*.rake', '*.gemspec', '*.rbx', '*.duby'],
+ 'text/x-rustsrc': ['*.rs', '*.rc'],
+ 'text/x-sass': ['*.sass'],
+ 'text/x-scala': ['*.scala'],
+ 'text/x-scaml': ['*.scaml'],
+ 'text/x-scheme': ['*.scm', '*.ss'],
+ 'text/x-scss': ['*.scss'],
+ 'text/x-smalltalk': ['*.st'],
+ 'text/x-snobol': ['*.snobol'],
+ 'text/x-sourcepawn': ['*.sp'],
+ 'text/x-sql': ['*.sql'],
+ 'text/x-sqlite3-console': ['*.sqlite3-console'],
+ 'text/x-squidconf': ['squid.conf'],
+ 'text/x-standardml': ['*.sml', '*.sig', '*.fun'],
+ 'text/x-systemverilog': ['*.sv', '*.svh'],
+ 'text/x-tcl': ['*.tcl'],
+ 'text/x-tea': ['*.tea'],
+ 'text/x-tex': ['*.tex', '*.aux', '*.toc'],
+ 'text/x-typescript': ['*.ts'],
+ 'text/x-vala': ['*.vala', '*.vapi'],
+ 'text/x-vbnet': ['*.vb', '*.bas'],
+ 'text/x-verilog': ['*.v'],
+ 'text/x-vhdl': ['*.vhdl', '*.vhd'],
+ 'text/x-vim': ['*.vim', '.vimrc', '.exrc', '.gvimrc', '_vimrc', '_exrc', '_gvimrc', 'vimrc', 'gvimrc'],
+ 'text/x-windows-registry': ['*.reg'],
+ 'text/x-xtend': ['*.xtend'],
+ 'text/x-yaml': ['*.yaml', '*.yml'],
+ 'text/xml': ['*.xml', '*.xsl', '*.rss', '*.xslt', '*.xsd', '*.wsdl'],
+ 'text/xquery': ['*.xqy', '*.xquery', '*.xq', '*.xql', '*.xqm'],
+ 'text/apl': [],
+ 'text/x-asterisk': [],
+ 'text/x-csrc': [],
+ 'text/x-c++src': ['*.cpp'],
+ 'text/x-coffeescript': ['*.coffee'],
+ 'text/x-d': ["*.d"],
+ 'text/x-ecl': ['*.ecl'],
+ 'text/x-go': ['*.go'],
+ 'text/x-haxe': ['*.hx'],
+ 'application/x-aspx': ['*.aspx'],
+ 'application/x-ejs': [],
+ 'message/http': [],
+ 'application/x-json': ['*.json'],
+ 'application/typescript': ['*.ts'],
+ 'jinja2': ['.jinja2'],
+ 'text/x-less': ['*.less'],
+ 'text/x-livescript': ['*.ls'],
+ 'text/mirc': [],
+ 'text/n-triples': [],
+ 'application/x-httpd-php': ['*.php'],
+ 'text/x-pig': [],
+ 'text/x-properties': ['*.properties'],
+ 'text/x-rsrc': [],
+ 'text/x-sh': ['*.sh', '*.ksh', '*.bash', '*.ebuild', '*.eclass', '.bashrc', 'bashrc', '.bash_*', 'bash_*'],
+ 'application/sieve': [],
+ 'text/x-stsrc': ['*.rs', '*.rc'],
+ 'text/x-smarty': ['*.tpl'],
+ 'application/x-sparql-query': [],
+ 'text/x-mariadb': ['*.sql'],
+ 'text/x-stex': [],
+ 'text/x-latex': ["*.ltx"],
+ 'text/x-tiddlywiki': [],
+ 'text/tiki': [],
+ 'text/x-vb': ['*.vb'],
+ 'text/vbscript': ['*.vb'],
+ 'text/velocity': [],
+ 'application/xml': ['*.xml', '*.xsl', '*.rss', '*.xslt', '*.xsd', '*.wsdl'],
+ 'application/xquery': ['*.xqy', '*.xquery', '*.xq', '*.xql', '*.xqm'],
+ 'text/x-z80': [],
+}
diff --git a/rhodecode/templates/admin/gists/new.html b/rhodecode/templates/admin/gists/new.html
--- a/rhodecode/templates/admin/gists/new.html
+++ b/rhodecode/templates/admin/gists/new.html
@@ -9,6 +9,7 @@
+
%def>
<%def name="css_extra()">