Blender Git Loki

UI: Separate each choice inside radio buttons

Add some room between the choices. This way we can give the background and
non-active options the same color and make it look more like only one choice
can be active at a time.

This is in an effort to make the radio buttons and toggle buttons look different.
Currently in Blender they looked the same even though radio buttons only allow
one active option at a time, while toggles can be have multiple.