App crash navigation drawer fix

[kunzef]

Issue

This fixes the following issue(s):

• Resolves: Streamline new navigation logic #1314 by replacing the old find method with a map
• Resolves: [BUG] App crashes when opening item from NavigationDrawer after opening anything from About #1589
• Maybe resolves [BUG] App crashes when using search function #1517 as the reason the app crashes when opening the search-function could be the same as in [BUG] App crashes when opening item from NavigationDrawer after opening anything from About #1589

Description of the fix

The error source of #1589 is the difference between the System locale and the Application locale. Somehow the Campus-App fails to correctly set its own Application locale. This leads to the crash as the NavigatioDrawer causing it, tries to find the clicked NavItem with a localized String resource. For example see this part of code from the NavigationDrawer menuItem.title == activity.getString(HOME.titleRes) here menuItem.title is based in the Application locale where under certain cirqumstances activity.getString() uses the System locale. It uses the System locale after any of the NavItem.ActivityDestination has been opened.

Why this is useful for all students

While it does not solve the underlying problem it still prevents the App from crashing and thus is at least a bit.

Further todos

The main problem causing this other problems and #1585 as well as maybe others is not solved with this. In regards to this I have openend the issue #1593 See there for further details.

[tobiasjungmann]

The code looks good to me and I was not able to crash the app. The map init calls for loops at the first glance but every solution without the copy past I could come up with would not be that intuitive :D It is a nice solution for a lot of issues!