Feat add model group modal #15

Add Model Group Modal:

Automatically updates name in transfer list after entering group name:

Transfers models in both directions:

Filters models based on input in search bar:

Plots warning if a currently selected model is not visible (due to filtering from search)

Responsive:

Displays circular spinners after initially before models were fetched:

testing

currently has a testing coverage of 50% I tried to wait in the tests until the spinners do not show anymore, but couldn't manage to do so /tableflip The utils file I created to handle array functions has a testing coverage of 100%