Deactivate Grid’s controllers when they resign key.
Activate the preferences most thoroughly.
The prefs window goes to the status window level.
Only deactivate if the application is not active when Grid windows resign key.
The Preferences window is a panel.
Prefs windows behave themselves better.

Fixes #4.
Fixes #5.

Merge branch 'feature/better-prefs-activation' into develop
HAXApplication can return its localized title and processIdentifier.
Reactivate the focused application when deactivating Grid.
Don’t deactivate when windows resign key, as that causes multimonitor uses to fail.
Apply the screen’s origin within the area selection view.
Flipping the selected area takes the screen’s offset into account.
Merge branch 'feature/better-multimonitor-handling' into develop