Only enable stuff if it works.

Avoids crash when deleting more than one index at once.
Uses playlist_RequestDelete to handle concurrent requests from
multiple UIs.
Fixes deletion also from context menu.

closes #22367

It happened when the decoder was created from input_DecoderCreate()

This moves the 'Clear' button to the changer panel and removes the 'Change' button in favor of double clicking items in the list.

From an end-user perspective, those are functional global hotkeys and it is irrelevant that the implementation for their support is in the UI and not the hotkeys module.

macosx/sprefs: remove Apple Remote settings since the devices are not dominant enough anymore to sustify such prominent settings

No functional changes

This introduces an indicator for media where we can be sure it is audio and privatices the cell content setting

This commit removes a lot of legacy code for control bar customization which is no longer desired in v4.

This reimplements the drop zone known from v3 to encourage media drops on the playlist for playback

Use CALayer instead of drawRect to show the focus ring and use an explicit instead of an implicit protocol for the handler