app: Implement basic uninstallation

This is merely the basic implementation on uninstall operation. It prominently lacks:

• App specific handling of configuration and other setup removal
• App specific handling of packages not be removed
• Purging of packages instead of removing them (some FreedomBox installed files will get removed sometimes).

I believe we can merge this because this shows a 'experimental' warning to users and we can continue to work on improvements.

assigned to @sunilmohan

I will continue to push app specific improvements here.

added 18 commits

• 59acfff3 - package: Implement low-level methods for uninstalling
• a880be93 - forms: Implement form for uninstallation
• 7dc38f7a - setup: Drop check for already running operation
• f79c5393 - app: Add API to uninstall an app
• d00527ae - package: Implement uninstall in Package component
• 9f8d08b1 - setup: Implement operation to uninstall an app
• 08103c25 - views: Implement a view to uninstall an app
• 32ba3655 - app: Add a menu item to trigger uninstallation
• e4ad717e - tests: functional: Add install/uninstall test for all apps
• 0a38ca73 - backups: Use AppView for the main app page
• c26827ab - diagnostics: Use AppView for app page
• effe6aa8 - names: Use AppView for app page
• 0b6c136e - networks: Use AppView for app page
• 830fb16d - power: Use AppView for app page
• 3d0245c4 - security: Use AppView for app page
• e51e219a - snapshot: Use AppView for app page
• d4e3acfc - letsencrypt: Use AppView for app page
• 9a4e99f4 - tor: Use AppView and Operation for app page

Compare with previous version

The pushed the following changes:

• Remove unused import to fix failing code quality checks.
• Added a check to make sure that uninstall view can't be shown for essential apps.
• Converted all the remaining app pages to use AppView (since uninstall feature requires sending additional context). This includes long pending significant updates to Tor app page.

resolved all threads

added 4 commits

• 7d4c1e76 - security: Use AppView for app page
• a3bd666e - snapshot: Use AppView for app page
• b63b4f55 - letsencrypt: Use AppView for app page
• a790960d - tor: Use AppView and Operation for app page

Compare with previous version

resolved all threads

I ran functional tests on all the apps which have switched to AppView.

Merged.

closed

mentioned in issue #266 (closed)

mentioned in merge request !2369 (closed)