Improve button-style snippet layout
Improve button-style snippet layout

There is no need to distinguish the icon colors anymore with Android
not tinting the icon automatically. The change also puts the buttons
and the checkbox in neighbouring columns.

Change-Id: Iacb3bda09b4f25a4ffc94af7305baf4ddf9b3a60

eclipsesource/tabris-js,eclipsesource/tabris-js,eclipsesource/tabris-js