Merge "KEYCODE_MENU: hide all apps when entering overview mode" into jb-ub-now-kermit

src/com/android/launcher3/Launcher.java

@@ -1972,9 +1972,7 @@ public class Launcher extends Activity
     @Override
     public boolean onPrepareOptionsMenu(Menu menu) {
         super.onPrepareOptionsMenu(menu);
-        if (!mWorkspace.isInOverviewMode()) {
-            mWorkspace.enterOverviewMode();
-        }
+        showOverviewMode(true);
         return false;
     }