Improve post composer + replying

- Make it modular so that different entry points can show different
things and respond differently (reply, new discussion, edit post)
- Resizable
- Fullscreen
- Confirm on close

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

@@ -1,9 +1,37 @@
 import Ember from 'ember';
 
+import TaggedArray from '../../../utils/tagged-array';
+import ActionButton from './action-button';
+
 export default Ember.Component.extend({
-    actions: {
-        save: function() {
-            this.sendAction('save', this.get('value'));
-        }
-    }
+	classNames: ['text-editor'],
+
+	didInsertElement: function() {
+		var controlItems = TaggedArray.create();
+		this.trigger('populateControls', controlItems);
+		this.set('controlItems', controlItems);
+
+		var component = this;
+		this.$('textarea').bind('keydown', 'meta+return', function() {
+			component.send('submit');
+		});
+	},
+
+	populateControls: function(controls) {
+		var component = this;
+		var submit = ActionButton.create({
+			label: this.get('submitLabel'),
+			className: 'btn btn-primary',
+			action: function() {
+				component.send('submit');
+			}
+		});
+		controls.pushObjectWithTag(submit, 'submit');
+	},
+
+	actions: {
+		submit: function() {
+			this.sendAction('submit', this.get('value'));
+		}
+	}
 });