Fix issues search overflow on low res.

app/views/issues/index.html.haml

@@ -4,7 +4,7 @@
     Issues
     %span (<span class=issue_counter>#{@issues.total_count}</span>)
     .pull-right
-      .span5
+      .span6
         - if can? current_user, :write_issue, @project
           = link_to new_project_issue_path(@project, issue: { assignee_id: params[:assignee_id], milestone_id: params[:milestone_id]}), class: "btn btn-primary pull-right", title: "New Issue", id: "new_issue_link" do
             %i.icon-plus