Add Categories, Tags and Tools to Manage Data Page

[Kuchenpirat]

What type of PR is this?

• feature

What this PR does / why we need it:

The "Manage Data" page was missing some entries. This adds the remaining data items (Categories, Tags & Tools) to the page and equips them with basic read, edit, delete functionality.

Special notes for your reviewer:

While working on this i discovered that tools cannot be created "on Hand". So for now this will not be displayed in data table.
Thx to the quick fix by @michael-genson "on Hand" is added to the tool table.

Testing

The tables are a dumbed down version of implementation of the existing version of the manage data page which i used as a template so they should be as stable as the existing implementation.
I tested everything quite extensivly and could not break it.

[michael-genson]

I added a fix for the tool onHand property not working right from the frontend. You should be able to add it back to your new data management page

This also fixes #2738

[michael-genson]

Looks good! I have a few smaller comments

I went in and added/edited items on the new pages and it all works as expected. I ran into a few weird things with the sorting but they aren't new issues, they've been there for a while

[michael-genson]

Love it, great work!