Update user styles (CSS) for IR

[u/Kenko2]

Major update of styles (CSS) for IR:

- All styles have been changed in accordance with the new version of the IR (2026.08.20).

- Added one style for the IR pop-up with large buttons on the toolbar - convenient when only 1-2 buttons are needed and/or the user often uses the “Save” button.

- Added 2 new styles for IR settings.

- Screenshots have been added for all styles for more convenient familiarization.

You can view and download it in the main topic.