old style: fix text areas in fork dialog

There's no textarea-repo style, so the entry box
isn't properly aligned.

rhodecode/templates/forks/fork.html

@@ -40,7 +40,7 b''
                 <div class="label label-textarea">
                     <label for="description">${_('Description')}:</label>
                 </div>
-                <div class="textarea-repo editor">
+                <div class="textarea editor">
                     ${h.textarea('description')}
                     <span class="help-block">${_('Keep it short and to the point. Use a README file for longer descriptions.')}</span>
                 </div>