feat: added dropdown clear button

[Aandree5]

Description

Not sure why this was commented out, but I was getting an issue where I was filtering an M3U file and then deleted the file, after I could not remove the filer because the option for that file was no longer available.

Type of Change

• New feature (non-breaking change which adds functionality)

Testing Instructions

• Steps to reproduce/test the changes

1. Add 2 M3U files
2. Filter streams list by file 1
3. Remove file 1
4. No longer possible to see any stream because is still filtering file 1

• Expected behaviour
  Selection to disappear automatically or allow to clear all

Visual Changes

• Screenshots/videos attached

Checklist

• I have followed the Conventional Commits naming convention
• My branch is up to date with the main branch (rebased)
• My code follows the style guidelines and existing patterns of this project
• I have performed a self-review of my own code
• I have commented complex logic
• All tests are passing

[carlreid]

Thanks 😊

Not sure why this was commented out

There's a lot commented out both UI and backend. My only guess is that the point in time we managed to restore to, was mid release or something.

Though a lot of commented out code is likely removable too.