added link to "title suggestion" in comment editor (publiclab#2155)

closes publiclab#2154

app/views/comments/_form.html.erb

@@ -86,6 +86,16 @@
       $('#comment-form .control-group .help-block ').remove()
       $('#comment-form .control-group').append('<span class="help-block ">Error: there was a problem.</span>')
     })
+
+    function insertTitleSuggestionTemplate() {
+      var element = $('#text-input');
+      var currentText = $('#text-input').val().trim();
+      var template = "\n[propose:title]Propose your title here[/propose]";
+      if(currentText.length == 0)
+        template = "[propose:title]Propose your title here[/propose]";
+      var newText = currentText+template;
+      element.val(newText);
+    }
   </script>
 
   <div class="control-group">
@@ -105,7 +115,8 @@
     <span style="color:#888;"> &nbsp; 
       <br class="visible-xs" /><%= raw t('comments._form.logged_in', :username => current_user.username) %> | 
       <a target="_blank" href="/wiki/authoring-help#Formatting"><%= t('comments._form.formatting') %></a> | 
-      <a onClick="$('#who-is-notified-form').toggle()"><%= t('comments._form.notifications') %></a>
+      <a onClick="$('#who-is-notified-form').toggle()"><%= t('comments._form.notifications') %></a> | 
+      <a onClick = "insertTitleSuggestionTemplate()">Propose Title</a>
     </span>
   </div>