Do not show overview when menu pressed on CustomContent screen.

Bug: 12524591
Change-Id: I2bc0c4d206214d994c9a9e1bd13b42f2e53dba9f

src/com/android/launcher3/Launcher.java

@@ -2044,18 +2044,24 @@ public class Launcher extends Activity
         }
     }
 
+    public boolean isOnCustomContent() {
+        return mWorkspace.isOnOrMovingToCustomContent();
+    }
+
     @Override
     public boolean onPrepareOptionsMenu(Menu menu) {
         super.onPrepareOptionsMenu(menu);
-        // Close any open folders
-        closeFolder();
-        // Stop resizing any widgets
-        mWorkspace.exitWidgetResizeMode();
-        if (!mWorkspace.isInOverviewMode()) {
-            // Show the overview mode
-            showOverviewMode(true);
-        } else {
-            showWorkspace(true);
+        if (!isOnCustomContent()) {
+            // Close any open folders
+            closeFolder();
+            // Stop resizing any widgets
+            mWorkspace.exitWidgetResizeMode();
+            if (!mWorkspace.isInOverviewMode()) {
+                // Show the overview mode
+                showOverviewMode(true);
+            } else {
+                showWorkspace(true);
+            }
         }
         return false;
     }