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/values-xlarge/dimens.xml b/java/res/values-xlarge/dimens.xml
index 58fea4e..ecf8709 100644
--- a/java/res/values-xlarge/dimens.xml
+++ b/java/res/values-xlarge/dimens.xml
@@ -23,7 +23,7 @@
     <dimen name="key_height">13.0mm</dimen>
     <dimen name="key_bottom_gap">1.5mm</dimen>
     <dimen name="key_horizontal_gap">2.0mm</dimen>
-    <dimen name="popup_key_height">15.0mm</dimen>
+    <dimen name="popup_key_height">13.0mm</dimen>
     <dimen name="keyboard_top_padding">1.0mm</dimen>
     <dimen name="keyboard_bottom_padding">1.0mm</dimen>
     <!-- key_height x 1.0 -->
@@ -34,11 +34,11 @@
     <!-- popup_key_height x -1.0 -->
     <dimen name="mini_keyboard_vertical_correction">-13.0mm</dimen>
 
-    <dimen name="key_text_size">24dip</dimen>
-    <dimen name="key_label_text_size">18dip</dimen>
+    <dimen name="key_letter_size">24dip</dimen>
+    <dimen name="key_label_text_size">14dip</dimen>
     <dimen name="key_preview_text_size_large">24dip</dimen>
-    <!-- left or right padding for of label alignment -->
-    <dimen name="key_label_horizontal_alignment_padding">18dip</dimen>
+    <!-- left or right padding of label alignment -->
+    <dimen name="key_label_horizontal_alignment_padding">4dip</dimen>
 
     <dimen name="candidate_strip_height">46dip</dimen>
 </resources>