Responsive design baby!

Mobile responsive design with a very native feel, all in pure CSS (no
templating differences between versions — even though some things are
in very different positions.)

I’ve been working on this whole thing in my head for a while now,
planning out how certain components will be laid out on the mobile
version, and how to reason about them in the templates so that a
substantially different layout can still be achieved by only using CSS.
Today I finally wrote the CSS and it’s come together pretty damn
perfectly.

Still to come:
- Swiping left or right on discussions to reveal controls
- Tablet version

ember/app/components/ui/text-editor.js

@@ -22,7 +22,7 @@ export default Ember.Component.extend(HasItemLists, {
   },
 
   populateControls: function(items) {
-    this.addActionItem(items, 'submit', this.get('submitLabel')).reopen({className: 'btn btn-primary'});
+    this.addActionItem(items, 'submit', this.get('submitLabel'), 'check').reopen({className: 'btn btn-primary', listItemClass: 'primary-control'});
   },
 
   actions: {