Passing `emboss=False`set `UI_EMBOSS_NONE` in the layout, which
completely disables button background colors for things like animation
state. This commit changes that to `UI_EMBOSS_NONE_OR_STATUS`,
which effectively restores the behavior to what it was prior to the
addition of that flag, with the added option to completely disable
the status emboss with `UI_EMBOSS_NONE`.
6c97c7f767