Remove magic paddings from bookmark view

 Use calculated sizes to correctly center without the need for
 "magic" padding values.

Change-Id: Ida64a80243df9bf05355dd1db1047fc16c10b726
diff --git a/res/layout/bookmark_grid_row.xml b/res/layout/bookmark_grid_row.xml
index 5dc3a76..7955ad7 100644
--- a/res/layout/bookmark_grid_row.xml
+++ b/res/layout/bookmark_grid_row.xml
@@ -17,8 +17,6 @@
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:paddingLeft="@dimen/combo_rowPadding"
-    android:paddingRight="@dimen/combo_rowPadding">
+    android:layout_height="match_parent">
 </LinearLayout>