Issues importing custom data into the program for tag editing etc.

[x-CK-x]

Various Causes:

• Auto-tag model not detected, preventing different functions of the Custom Data Tab` from functioning properly
• User tries to import data with invalid tags
• Another (just failing to copy files; no error) : i.e. no image/s nor tag files are copying over <-> I'll update this as I find out more information

I may have to split up the tab functionality to reduce a lot of the overhead; since there's a lot of moving parts regarding that Tab alone. Possibly moving some feature/s currently on that Tab to another "new" Tab, and/or reformat the existing layout of that Tab. https://github.com/x-CK-x/Dataset-Curation-Tool/issues/15