Extensive modernization merge

[tejado]

Changes from upstream

For modernization of Authorizer, I merge mostly all changes from upstream (PasswdSafe for Android) from the last years.
This includes changes like:

• Integrating a backup-on-write feature
• Additional sort mechanisms
• Improved search
• Viewing specific characters of your password
• Theme Light/dark mode depending on the system
• Updating libraries
• Replacing some of the deprecated functions
• and much more

For more details: https://sourceforge.net/p/passwdsafe/code/ci/default/log/?path=

Additional Changes

• Bluetooth rework
• Adding bottom navigation which replaces the nav drawer
• Native USB mode in case /dev/hidg files are writeable by Authorizer directly without root
• Improved the overall License section to honor all dependend projects