Settings key always exists in more keys of shortcut/f1 key

This change also
  * Fix comman/f1 key for Arabic keyboard.
  * Removes "show settings key option" and related stuff.
  * Renames and simplifies F2 key to shortcut key on 7 inch tablet.

Change-Id: Ib1cf99ad00d9780a2f0d170260e756771e161521
diff --git a/java/res/xml-sw600dp/row_qwerty4.xml b/java/res/xml-sw600dp/row_qwerty4.xml
index b06508e..3c2f06d 100644
--- a/java/res/xml-sw600dp/row_qwerty4.xml
+++ b/java/res/xml-sw600dp/row_qwerty4.xml
@@ -71,6 +71,6 @@
             latin:keyXPos="-10.00%p"
             latin:keyWidth="0%p" />
         <include
-            latin:keyboardLayout="@xml/key_f2" />
+            latin:keyboardLayout="@xml/key_shortcut" />
     </Row>
 </merge>