Fix submodule paths when AppSubUrl is not root (#11098) (#11176)

Backport #11098

Fix #11002

Signed-off-by: Andrew Thornton <art27@cantab.net>

templates/repo/view_list.tmpl

@@ -64,7 +64,7 @@
 					<td>
 						<span class="truncate">
 							<span class="octicon octicon-file-submodule"></span>
-							{{$refURL := $commit.RefURL AppUrl $.BranchLink}}
+							{{$refURL := $commit.RefURL AppUrl $.Repository.FullName}}
 							{{if $refURL}}
 								<a href="{{$refURL}}">{{$entry.Name}}</a> @ <a href="{{$refURL}}/commit/{{$commit.RefID}}">{{ShortSha $commit.RefID}}</a>
 							{{else}}