Add view_issues permission (#3187).

A migration adds this permission to all existing roles to preserve current behaviour.
This permission controls access to issues, roadmap and changelog.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3039 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/projects/index.rhtml

@@ -1,6 +1,6 @@
 <div class="contextual">
     <%= link_to(l(:label_project_new), {:controller => 'projects', :action => 'add'}, :class => 'icon icon-add') + ' |' if User.current.allowed_to?(:add_project, nil, :global => true) %>
-    <%= link_to l(:label_issue_view_all), { :controller => 'issues' } %> |
+    <%= link_to(l(:label_issue_view_all), { :controller => 'issues' }) + ' |' if User.current.allowed_to?(:view_issues, nil, :global => true) %>
     <%= link_to l(:label_overall_activity), { :controller => 'projects', :action => 'activity' }%>
 </div>