Update Alpha menu - refactor, bugfix, and QOL updates

[cewert]

This converts the alpha menu to use the correct styling for vars, it moves the mic icon inside the alpha node, fixes an edge case bug, and adds some quality of life improvements.

Changes

• Refactor Alpha.bs and all files that use it to use lowerCamelCase for all var names
• Move the mic icon from ItemGrid, MovieLibraryView, and MusicLibraryView and put it inside the Alpha component. Also removes the mic text completely
  • Moved the mic icon and mic text to the overhang to match the tvguide page (except for music library which hides the overhang)
  • The tvguide/itemgrid was the only thing using the mic text (and reusing the mic icon). I am now creating the mic icon and text nodes as needed for the livetv guide view.
• Convert mic icon from a Button to a Poster node
  • It was difficult to reproduce in the first place but I haven't been able to reproduce Alpha menu mic icon can be focused and selected #1525 since making this change
• Keep focus on alpha menu after selecting a letter
  • EDIT: I'm keeping focus on alpha menu now whenever it is active no matter what. Including after using the voice filter option
• When a user selects the same letter that is already focused, remove the current filter instead of doing nothing
• Move logic to show mic icon into Alpha.bs
• When using the voice search/filter feature, if the users search is for a single character, select the corresponding option on the alphamenu i.e. saying "Z" will select "Z" on the alhpamenu. saying 3 will select "#" etc.

Issues

Fixes #1297
Fixes #1526
Fixes #1527
Fixes #1528

Note: there was one thing I tried to fix but couldn't figure out how:

• When the alpha menu is not focused, there is a wide "focused" overlay that shows up on top of it although it is hard to see with the naked eye. Here is a screenshot after first load of the movie library (notice the overlay around #)
  

[jellyfin-bot]

This pull request has merge conflicts. Please resolve the conflicts so the PR can be reviewed. Thanks!

[jellyfin-bot]

This pull request has been inactive for 21 days and will be automatically closed in 7 days if there is no further activity.

[1hitsong]

In my Movie library, in Presentation view, I clicked a letter and it threw an error on line 737 m.spinner.visible = true

[cewert]

hah so the reason I missed that crash was because of my movie library being bugged (it would load using the itemgrid instead of the movie specific grid). Apparently that fixed itself recently because I can reproduce this crash. Great timing 😆

[jellyfin-bot]

This pull request has been inactive for 21 days and will be automatically closed in 7 days if there is no further activity.

[jellyfin-bot]

This pull request has merge conflicts. Please resolve the conflicts so the PR can be reviewed. Thanks!

[1hitsong]

This also likely fixes #1297

[jellyfin-bot]

This pull request has been inactive for 21 days and will be automatically closed in 7 days if there is no further activity.

[jellyfin-bot]

This pull request has been closed because it has been inactive for 28 days. You may submit a new pull request if desired.

[jellyfin-bot]

This pull request has been inactive for 21 days and will be automatically closed in 7 days if there is no further activity.

[jellyfin-bot]

This pull request has been closed because it has been inactive for 28 days. You may submit a new pull request if desired.