backup-tool

Is your feature request related to a problem? Please describe it.
When I open the "Sort & Filter" settings page, the top of the page has three stats:

Apps count
Backups count
Updated count

It seems the "Apps" count is the total for all system + user apps on the device regardless of the filters set on this page.

Unless I am missing something, is showing the total count of system + u

Add a parameter to print output in json format.

Currently, the code is not well documented, any kind of documentation is gold.