Fix mulitple tab navigation highlighting and content hiding (#20906).

Patch by Felix Gliesche.

git-svn-id: http://svn.redmine.org/redmine/trunk@14728 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/javascripts/application.js

@@ -315,8 +315,8 @@ function toggleMultiSelect(el) {
 }
 
 function showTab(name, url) {
-  $('div#content .tab-content').hide();
-  $('div.tabs a').removeClass('selected');
+  $('#tab-content-' + name).parent().find('.tab-content').hide();
+  $('#tab-content-' + name).parent().find('div.tabs a').removeClass('selected');
   $('#tab-content-' + name).show();
   $('#tab-' + name).addClass('selected');
   //replaces current URL with the "href" attribute of the current link