Add timer for checking themes

[chase9]

I added a simple timer which checks every 45 seconds to see if the theme needs to be changes. This solves the issue with the flatpak version not being able to utilize systemd units.

I picked 45 seconds since it seems like a good compromise between the resource usage of checking every second, and the user experience of needing to potentially wait a full minute before the theme switches.

The timer is only created if running in the flatpak version so that we don't step on any toes.

[chase9]

Sorry for the excessive commits, I'm still pretty green to Python. Turns out this is a pretty straightforward implementation. I create a timer in main which calls the theme switcher every 45 seconds. I just needed to set the daemon property of the timer so that Python would kill the thread when the application tried to close.

[l0drex]

Thanks, looks good! I will test this tomorrow and then merge.

But for the future, please try to minimize formatting changes. This makes it really hard for me to see whats going on. If you want, you can push all of these changes in one pr. I assume you use a tool for this, if so, please provide the config as well so we can share and maintain the code style.

Keep up the good work, and happy new year!

[chase9]

Sorry for pushing the formatting changes. I'm using the Black Formatter plugin for VScode, along with Flake8 and isort and they are all using default settings. Happy to look into setting up an EditorConfig file or something if you would like. I'll reset my branch so it's just the one change.

[chase9]

Just force pushed as I didn't realize that the Python timer only executes once. This new implementation should repeat indefinitely. I tested a couple of theme shifts and it looks good. I'll give it a day to make sure my system keeps changing theme automatically.

[chase9]

I've been running this for three days now and can confirm no issues. The application backgrounds and switches themes automatically when running in Flatpak!