Swap from ui_opacity to panel_disabled

to simplify the process of disabling panels in the UI.

src/components/views/rooms/ForwardMessage.js

@@ -30,10 +30,9 @@ module.exports = React.createClass({
 
     componentWillMount: function() {
         dis.dispatch({
-            action: 'ui_opacity',
-            leftOpacity: 1.0,
-            rightOpacity: 0.3,
-            middleOpacity: 0.5,
+            action: 'panel_disable',
+            rightDisabled: true,
+            middleDisabled: true,
         });
     },
 
@@ -43,9 +42,9 @@ module.exports = React.createClass({
 
     componentWillUnmount: function() {
         dis.dispatch({
-            action: 'ui_opacity',
-            sideOpacity: 1.0,
-            middleOpacity: 1.0,
+            action: 'panel_disable',
+            sideDisabled: false,
+            middleDisabled: false,
         });
         document.removeEventListener('keydown', this._onKeyDown);
     },