Bookmarks: Improve stability & fix layout issues

This merge request brings adjustments to the bookmarks:

• The bookmarks table view's background color is set to clear in order to avoid turning it unreadable.
• The audio player's controls are now disabled when the interactive mode of the bookmarks view is displayed, aligning to the behavior of the same view in the video player.
• The interactive mode of the bookmarks view is now aligned to the safe area enabling devices with a notch to display the view properly.
• The edit actions of the bookmarks table view are fixed for devices running with iOS 12.0 versions or below.

Closes #1724 (closed)

Closes #1725 (closed)

Closes https://code.videolan.org/videolan/ios-support/-/issues/6205

This merge request also brings a fix to the action sheet's header view:

• The action sheet's header view is now properly reset when the closing animation ends in order to avoid any visual glitch.

Closes #1723 (closed)

changed milestone to %3.4.8

added Bug Interface Maintenance labels

resolved all threads

approved this merge request

added 6 commits

• 9e024c43 - 1 commit from branch videolan:master
• e452ae4d - ActionSheet: Properly reset the header view
• d5b717c9 - BookmarksView: Fix table view background color
• fcbb3911 - AudioPlayerViewController: Disable controls when the bookmarks view is displayed
• 853660b5 - AudioPlayerViewController: Align the bookmarks view to the safe area
• 110b39a9 - PlayerViewController: Fix the bookmarks edit actions

Compare with previous version

merged