* Fix wrong hook being torn down
* Fix item models not being destroyed
* Add missing gc for FilteredDeckConfigDialog
* Add missing type annotation
* Pass calling widget as parent to QTimer
Implicitly passing `self.mw` as the parent means that the QTimer won't
get destroyed before quitting the app, which also thwarts garbage
collection of any data captured by a passed closure.
* Make `Editor._links` an instance variable
Browser is inserting a closure into this dict capturing itself. As a class
variable, it won't get destroyed, so neither will the browser.
* Make `Editor._links` funcs take instance again
* Deprecate calling progress.timer() without parent
* show caller location when printing deprecation warning (dae)
* Use submodule imports in aqt
* Use submodule imports in pylib
* More submodule imports in pylib
These required removing some direct imports to get rid of import cycles.
The enum changes should work on PyQt 5.x, and are required in PyQt 6.x.
They are not supported by the PyQt5 typings however, so we need to run
our tests with PyQt6.
