(refs #383)Disable "New Issue" button in the new issue creation page.

src/main/twirl/issues/tab.scala.html

@@ -1,4 +1,4 @@
-@(active: String, repository: service.RepositoryService.RepositoryInfo)(implicit context: app.Context)
+@(active: String, create: Boolean, repository: service.RepositoryService.RepositoryInfo)(implicit context: app.Context)
 @import context._
 @import view.helpers._
 <ul class="nav nav-tabs pull-left fill-width">
@@ -7,7 +7,11 @@
   @if(loginAccount.isDefined){
   <li class="pull-right">
     <div class="btn-group">
-      <a class="btn btn-small btn-success" href="@url(repository)/issues/new">New Issue</a>
+      @if(create){
+        <a class="btn btn-small btn-success" href="#" disabled="disabled">New Issue</a>
+      } else {
+        <a class="btn btn-small btn-success" href="@url(repository)/issues/new">New Issue</a>
+      }
     </div>
   </li>
   }