[FEATURE] Allow user to add custom keys (not pgp key)

[rEnr3n]

Is your feature request related to a problem? Please describe.
The password file organization I use is work/example.org/john@doe.org(.gpg).

All of my entries contain things like URL: https://example.com/, Tag: xxx. APS doesn't officially recognize them and puts them all in Extra content:. If I need to copy one of the values (e.g. URL), I would need to hold my finger on the string I want to copy hoping that it selects the text properly. This is not as simple when the Extra content: consumes more space than the screen size. Holding my finger on one spot can select multiple lines. Trying to adjust the selection can get it jerky. I end up being frustrated.

Describe the solution you'd like
Allow users to add their own keys like URL:, Tag:, etc. so that they can be displayed and copied independently. Unrecognized keys should still go to Extra content:

Describe alternatives you've considered
n/a

Additional context
n/a

[msfjarvis]

This is a duplicate of #1191 and #1412, which was fixed but hasn't been released yet. If you want immediate access to the functionality you can use the snapshot builds but beware that downgrading back to the Play Store version will require uninstalling and reinstalling from the Play Store.