Unify data into one action/middleware/reducer flow

src/js/services/ui/actions.js

@@ -16,6 +16,13 @@ export function hideContextMenu(){
 	}
 }
 
+export function setCurrentTrack( track ){
+    return {
+        type: 'UI_CURRENT_TRACK',
+        track: track
+    }
+}
+
 export function lazyLoading( start ){
     return {
         type: 'UI_LAZY_LOADING',

src/js/services/ui/reducer.js

@@ -19,6 +19,11 @@ export default function reducer(ui = {}, action){
         case 'UI_LAZY_LOADING':
             return Object.assign({}, ui, { lazy_loading: action.start });
 
+        case 'UI_CURRENT_TRACK':
+            var current_track = ui.current_track;
+            Object.assign({}, current_track, action.track );
+            return Object.assign({}, ui, { current_track: current_track });
+
         default:
             return ui
     }