Focus window before switching space

[mogenson]

A series of commits to try to make working with multiple spaces on multiple displays a little more robust:

Add a refresh_windows command

In case window tiling gets into a bad state (happens when attaching
and detaching an external monitor) provide a command to refresh the
current windows and retile spaces as required.

Collect all windows from the current window filter and check if they
exist in the window list and if there space has changed.

Raise app before focusing window on new Space

Following a tip in this Hammerspoon issue thread:
https://github.com/Hammerspoon/hammerspoon/issues/370
Activate the app a window belongs to, wait a small amount, then try to
focus the window on a new Space. Do this before switching to the new
Space so a window is focused and PaperWM.spoon is ready to navigate via
keyboard shortcuts after switching.

Find a window to focus in new Space before switching

Try to work around some behavior in MacOS when switching Mission Control
Spaces:

- No window is focused after switching to new space, requiring a mouse
click before PaperWM.spoon keyboard control can resume.

- A window in the previous space is still focused so the active window
is not on the active space.

Focusing a window in the new space before switching to the space seems
to work a bit better than switching then focusing.

auto-formatter changes