Tweak tablet keyboard design

This change introduces,
- center align "More" key label
- remove drop shadow from key label
- darker key label color when manual temporary upper case
- narrower pop up mini keyboard
- remove unnecessary key background from pop up mini keyboard
- smaller key label in portrait

Bug: 3216592
Change-Id: I77e0733f467a88aa32e09fcbace56fe08f755229
diff --git a/java/res/xml-xlarge-land/popup_domains.xml b/java/res/xml-xlarge-land/popup_domains.xml
index 9ed79c8..deedba4 100644
--- a/java/res/xml-xlarge-land/popup_domains.xml
+++ b/java/res/xml-xlarge-land/popup_domains.xml
@@ -20,7 +20,7 @@
 
 <Keyboard
     xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
-    latin:keyWidth="5.0%p"
+    latin:keyWidth="4.0%p"
     latin:horizontalGap="0px"
     latin:verticalGap="0px"
     latin:keyHeight="@dimen/popup_key_height"