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-sw768dp/row_qwerty4.xml b/java/res/xml-sw768dp/row_qwerty4.xml
index 84c4a37..24c081e 100644
--- a/java/res/xml-sw768dp/row_qwerty4.xml
+++ b/java/res/xml-sw768dp/row_qwerty4.xml
@@ -24,15 +24,8 @@
     <Row
         latin:keyWidth="8.047%p"
     >
-        <switch>
-            <case
-                latin:hasSettingsKey="true"
-            >
-                <Key
-                    latin:keyStyle="settingsKeyStyle"
-                    latin:keyWidth="8.047%p" />
-            </case>
-        </switch>
+        <include
+            latin:keyboardLayout="@xml/key_settings" />
         <Spacer
             latin:keyXPos="15.157%p"
             latin:keyWidth="0%p" />