Clean up downloaded APKs

[DZAladan]

Note: I'm aware you're refactoring the app and you might know this issue already. I wanted to add it just in case.

Is your feature request related to a problem?
APKs remain the the app's data folder even after installation, causing storage to fill up.

Describe the solution you'd like
Simply an option, not necessarily automated, to delete the APK files from the app.

Describe alternatives you've considered
So far I've been doing it manually by navigating to the app folder and deleting the apks myself. Not a big issue for me, a little annoying at worst, but less experienced/unaware people may not know what's going on.

[rainxchzed]

Hey @DZAladan Thanks for suggestion! Upcoming update is going to kind of fix this issue indirectly as its going to delete the file when you leave the details screen. But i will add the button to cleanup caches directory in-case, Thanks!

[rainxchzed]

@DZAladan Done #299