Add custom tag modal

[revam]

I made sure the functionality of it is working as intended according to how I would assume it should work before I started this PR. As for all other aspects, feel free to roast it.

The final UI doesn't quite match the mock-ups, since I discovered while building/testing that a) the mock-up is old and the modal/dialog style is outdated compared to the current code base, and b) the lack of any indicator showing which tags are currently added/in-use, which I addressed, and c) the lack of any toggle for adding/removing tags from use on a series, which I also addressed.

[harshithmohan]

The modal doesn't need to be stored in redux store if it's only being used from one place.

[harshithmohan]

Other than the comments. The flow is confusing.

Separate the add/edit functionality into a separate modal and keep this one for just selecting the tag. Maybe we should put the add/edit away in the settings or something. But right now it's just confusing. And it also needs to allow removing or adding multiple tags at once. It does do that.. I was expecting I just select things and click on "save"

Tagging @ElementalCrisis for thoughts

EDIT: Just realized this is EC's design..

[ElementalCrisis]

Other than the comments. The flow is confusing.

Separate the add/edit functionality into a separate modal and keep this one for just selecting the tag. Maybe we should put the add/edit away in the settings or something. But right now it's just confusing. And it also needs to allow removing or adding multiple tags at once. It does do that.. I was expecting I just select things and click on "save"

Tagging @ElementalCrisis for thoughts

EDIT: Just realized this is EC's design..

Tags in general need a better way to view/manage, being tied strictly to shows or applied in a filter leaves a lot to be desired. An idea I have is more global tag management where you can search/view tags, see how many series have them, easily manage custom tags, hide/ignore tags.

Something we can look into for V3 if there is demand and want for it.

[revam]

It's been a week. I'm not waiting for a another technical review. Any UI/UX changes should probably be forwarded to the potential v3 design, for now I'm merging this so it's possible to create/delete/add/remove custom tags at all.