Slightly wider space key for 10-inch tablet layouts

This change also removes the usage of "fillBoth" keyWidth from 10-inch
tablet layouts.

Change-Id: Ie6844fc096712daa24e09b3d67dde48d1c03eb46
diff --git a/java/res/xml-sw768dp/rows_thai.xml b/java/res/xml-sw768dp/rows_thai.xml
index c7720c9..7721bc5 100644
--- a/java/res/xml-sw768dp/rows_thai.xml
+++ b/java/res/xml-sw768dp/rows_thai.xml
@@ -31,7 +31,7 @@
             latin:keyXPos="11.508%p" />
         <Key
             latin:keyStyle="deleteKeyStyle"
-            latin:keyWidth="fillBoth"/>
+            latin:keyWidth="fillRight"/>
     </Row>
     <Row
         latin:keyWidth="7.079%p"
@@ -54,7 +54,7 @@
             latin:keyboardLayout="@xml/rowkeys_thai3" />
         <Key
             latin:keyStyle="enterKeyStyle"
-            latin:keyWidth="fillBoth" />
+            latin:keyWidth="fillRight" />
     </Row>
     <Row
         latin:keyWidth="7.181%p"