Keyboard layout improvements.

Increase key height in portrait.
Increase spacebar width and reduce punctuation width.
Increase vertical target area for spacebar to avoid accidentally
   hitting "V" and "B".
Increase height of candidate strip.
diff --git a/res/xml/kbd_symbols.xml b/res/xml/kbd_symbols.xml
index ecdf751..f3b8833 100755
--- a/res/xml/kbd_symbols.xml
+++ b/res/xml/kbd_symbols.xml
@@ -94,10 +94,10 @@
     </Row>
     
     <Row>
-        <Key android:codes="-1" android:keyLabel="@string/label_alt_key" 
-                android:keyWidth="15%p" android:isModifier="true" 
+        <Key android:codes="-1" android:keyLabel="@string/label_alt_key"
+                android:keyWidth="15%p" android:isModifier="true"
                 android:isSticky="true" android:keyEdgeFlags="left"/>
-        <Key android:codes="33" android:keyLabel="!" 
+        <Key android:codes="33" android:keyLabel="!"
                 android:popupKeyboard="@xml/kbd_popup_template"
                 android:popupCharacters="¡"
         />
@@ -119,18 +119,19 @@
     </Row>
     
     <Row  android:rowEdgeFlags="bottom">
-        <Key android:codes="-2" android:keyLabel="@string/label_alpha_key" 
+        <Key android:codes="-2" android:keyLabel="@string/label_alpha_key"
                 android:popupKeyboard="@xml/kbd_popup_template"
                 android:popupCharacters="_"
                 android:keyWidth="20%p" android:keyEdgeFlags="left"/>
-        <Key android:keyLabel="," android:keyWidth="15%p" 
+        <Key android:keyLabel="," android:keyWidth="10%p"
                 android:popupKeyboard="@xml/kbd_popup_template"
                 android:popupCharacters="‚„"
         />
-        <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space" android:keyWidth="30%p" 
+        <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space"
+                android:keyWidth="40%p"
                 android:iconPreview="@drawable/sym_keyboard_feedback_space"
                 android:isRepeatable="true"/>
-        <Key android:keyLabel="." android:keyWidth="15%p" />
+        <Key android:keyLabel="." android:keyWidth="10%p" />
         <Key android:codes="10" android:keyIcon="@drawable/sym_keyboard_return" android:keyWidth="20%p" android:keyEdgeFlags="right"
                 android:iconPreview="@drawable/sym_keyboard_feedback_return"
                 />