The goal is to catch cases where the return value exists, but is
forgotten. There was a large enough number of them to turn this
into a real check. Initially, I just wanted to implement it to fix
the problems, then delete the code. But since this is so common, I
think it is worth the annoyance.
When the theme variables were moved to the backend instead of `rc.lua`,
some magic was added to disable them if the user set the border. However,
some undocumented `awful.placement` code also set them and turned off
the theme variables. So it worked *once* then stopped working.
If client client was tiled, the `fallback` could be
`theme.border_color_normal`, but if the client was
tiled, this fallback was never tried.
Now it tests for both "floating" and "active" fallbacks.
This problem actually affects the default theme.
This caused a behavior change it wasn't clear how to use the
permission API to change the focus mode.
The change will only take effect if the user override the API
level.
Actionless Loveless
Emmanuel Lepage Vallee
Unai