Tests:
- DONE: Check if package manager is busy works
- DONE: Power app shows status in app/restart/shutdown pages
- DONE: Upgrades app shows in app page and first boot wizard page
- DONE: When attempting force upgrade, busy state results in a back-off
- DONE: An app's packages can be installed/uninstalled successfully
- DONE: apt update is run before install
- DONE: If network is not available during package install, error message is shown
- DONE: Filtering packages with configuration file prompts works. Tested with
firewall 1.0.3 to 1.2.1.
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>
