9787 delete button

[MilanLoveless]

What's this PR do?

Adds a delete button to the cog menu on item cards.

Where should the reviewer start?

How should this be manually tested?

Click on an item and then the cog button. Press "Delete"

Any background context you want to provide?

This is the first time I've worked on a production flux app.. I probably did something wrong.

What are the relevant tickets?

Fixes #9787

Screenshots (if appropriate)

What gif best describes this PR or how it makes you feel?

[fluxusfrequency]

Very nice! :+1:

[MilanLoveless]

Thanks, Borat :)