ui: add arrow navigation for parent/child in changelog view.

- allows easier to tell if we browse next/prev commit

rhodecode/public/css/rcicons.less

@@ -55,6 +55,10 b''
   /* text-shadow: 1px 1px 1px rgba(127, 127, 127, 0.3); */
 }
 
+.icon-no-margin::before {
+    margin: 0;
+
+}
 // -- ICON CLASSES -- //
 
 .icon-bookmark:before { content: '\e803'; } /* '' */

rhodecode/templates/changeset/changeset.mako

@@ -62,11 +62,11 b''
           </div>
           <div class="pull-right">
               <span id="parent_link">
-                <a href="#parentCommit" title="${_('Parent Commit')}">${_('Parent')}</a>
+                <a href="#parentCommit" title="${_('Parent Commit')}"><i class="icon-left icon-no-margin"></i>${_('parent')}</a>
               </span>
                |
               <span id="child_link">
-                <a href="#childCommit" title="${_('Child Commit')}">${_('Child')}</a>
+                <a href="#childCommit" title="${_('Child Commit')}">${_('child')}<i class="icon-right icon-no-margin"></i></a>
               </span>
           </div>
       </div>