hgweb: don't point graph links at tip hash where it doesn't make sense

Some pages, e.g. bookmarks, help and summary don't have a meaningful revision
context: they always either show information about tip or about the whole repo
(and not about any specific changeset). And error pages can just show hgweb
error messages, not related to any repo or changeset.

When monoblue style was added in 91b0ada2d94b, however, all graph links had
tried to point at some hash, and on such pages as described above it didn't
make sense. On error pages '{node|short}' is empty string anyway.

Of course, it worked, but seeing such pages without revision context provide
links with hashes is a bit confusing (unless you keep current tip hash in your
head at all times) and wasn't consistent with other template styles, other
pages in monoblue and even other links on the same page.

Let's just link to '/graph', which is equal to '/graph/tip'.

mercurial/templates/monoblue/bookmarks.tmpl

@@ -21,7 +21,7
             <li><a href="{url|urlescape}summary{sessionvars%urlparameter}">summary</a></li>
             <li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
             <li><a href="{url|urlescape}changelog{sessionvars%urlparameter}">changelog</a></li>
-            <li><a href="{url|urlescape}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
+            <li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
             <li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
             <li class="current">bookmarks</li>
             <li><a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a></li>

mercurial/templates/monoblue/branches.tmpl

@@ -21,7 +21,7
             <li><a href="{url|urlescape}summary{sessionvars%urlparameter}">summary</a></li>
             <li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
             <li><a href="{url|urlescape}changelog{sessionvars%urlparameter}">changelog</a></li>
-            <li><a href="{url|urlescape}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
+            <li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
             <li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
             <li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
             <li class="current">branches</li>

mercurial/templates/monoblue/error.tmpl

@@ -21,7 +21,7
             <li class="current">summary</li>
             <li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
             <li><a href="{url|urlescape}log{sessionvars%urlparameter}">changelog</a></li>
-            <li><a href="{url|urlescape}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
+            <li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
             <li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
             <li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
             <li><a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a></li>

mercurial/templates/monoblue/help.tmpl

@@ -21,7 +21,7
             <li><a href="{url|urlescape}summary{sessionvars%urlparameter}">summary</a></li>
             <li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
             <li><a href="{url|urlescape}changelog{sessionvars%urlparameter}">changelog</a></li>
-            <li><a href="{url|urlescape}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
+            <li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
             <li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
             <li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
             <li><a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a></li>

mercurial/templates/monoblue/helptopics.tmpl

@@ -21,7 +21,7
             <li><a href="{url|urlescape}summary{sessionvars%urlparameter}">summary</a></li>
             <li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
             <li><a href="{url|urlescape}changelog{sessionvars%urlparameter}">changelog</a></li>
-            <li><a href="{url|urlescape}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
+            <li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
             <li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
             <li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
             <li><a href="{url|urlescape}help{sessionvars%urlparameter}">branches</a></li>

mercurial/templates/monoblue/notfound.tmpl

@@ -21,7 +21,7
             <li class="current">summary</li>
             <li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
             <li><a href="{url|urlescape}log{sessionvars%urlparameter}">changelog</a></li>
-            <li><a href="{url|urlescape}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
+            <li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
             <li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
             <li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
             <li><a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a></li>

mercurial/templates/monoblue/search.tmpl

@@ -21,7 +21,7
             <li><a href="{url|urlescape}summary{sessionvars%urlparameter}">summary</a></li>
             <li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
             <li><a href="{url|urlescape}log{sessionvars%urlparameter}">changelog</a></li>
-            <li><a href="{url|urlescape}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
+            <li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
             <li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
             <li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
             <li><a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a></li>

mercurial/templates/monoblue/summary.tmpl

@@ -21,7 +21,7
             <li class="current">summary</li>
             <li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
             <li><a href="{url|urlescape}log{sessionvars%urlparameter}">changelog</a></li>
-            <li><a href="{url|urlescape}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
+            <li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
             <li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
             <li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
             <li><a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a></li>

mercurial/templates/monoblue/tags.tmpl

@@ -21,7 +21,7
             <li><a href="{url|urlescape}summary{sessionvars%urlparameter}">summary</a></li>
             <li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
             <li><a href="{url|urlescape}changelog{sessionvars%urlparameter}">changelog</a></li>
-            <li><a href="{url|urlescape}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
+            <li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
             <li class="current">tags</li>
             <li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
             <li><a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a></li>