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_bulgarian.xml b/java/res/xml-sw768dp/rows_bulgarian.xml
index cb05fd5..6453414 100644
--- a/java/res/xml-sw768dp/rows_bulgarian.xml
+++ b/java/res/xml-sw768dp/rows_bulgarian.xml
@@ -24,7 +24,7 @@
     <include
         latin:keyboardLayout="@xml/key_styles_common" />
     <Row
-        latin:keyWidth="7.186%p"
+        latin:keyWidth="7.375%p"
     >
         <Key
             latin:keyStyle="tabKeyStyle"
@@ -35,10 +35,10 @@
             latin:keyLabelFlags="disableAdditionalMoreKeys|disableKeyHintLabel" />
         <Key
             latin:keyStyle="deleteKeyStyle"
-            latin:keyWidth="fillBoth" />
+            latin:keyWidth="fillRight" />
     </Row>
     <Row
-        latin:keyWidth="7.186%p"
+        latin:keyWidth="7.227%p"
     >
         <Key
             latin:keyStyle="toSymbolKeyStyle"
@@ -48,10 +48,10 @@
             latin:keyboardLayout="@xml/rowkeys_bulgarian2" />
         <Key
             latin:keyStyle="enterKeyStyle"
-            latin:keyWidth="fillBoth" />
+            latin:keyWidth="fillRight" />
     </Row>
     <Row
-        latin:keyWidth="7.125%p"
+        latin:keyWidth="7.186%p"
     >
         <Key
             latin:keyStyle="shiftKeyStyle"
@@ -62,7 +62,7 @@
             latin:keyboardLayout="@xml/keys_comma_period" />
         <Key
             latin:keyStyle="shiftKeyStyle"
-            latin:keyWidth="fillBoth" />
+            latin:keyWidth="fillRight" />
     </Row>
     <include
         latin:keyboardLayout="@xml/row_qwerty4" />