Fixing issue with folders not showing up.

- Add long click on empty spaces in hotseat to show overview mode
- Limit the height of all apps to the workspace + hotseat size
- Fixing some comments

Change-Id: Ie5a97a8b04e449385e2b3f6230079aebf8e15d5a
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index ec787614..fbbb09f 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -69,6 +69,14 @@
     CellLayout getLayout() {
         return mContent;
     }
+
+    /**
+     * Registers the specified listener on the cell layout of the hotseat.
+     */
+    @Override
+    public void setOnLongClickListener(OnLongClickListener l) {
+        mContent.setOnLongClickListener(l);
+    }
   
     private boolean hasVerticalHotseat() {
         return (mIsLandscape && mTransposeLayoutWithOrientation);