Piotr Brzeziński edfd44d088 examples: iOS tutorial improvements
- Fixes a crash in tutorial 5, which happened when going back from video playback to the 'library' view, due to
ui_delegate already being destroyed at that point.

- Updates layouts to avoid navigation bar overlapping play/pause buttons. Colours are now correctly updated
based on light/dark mode being enabled, overall look and feel is improved with bigger buttons and paddings.
New button types are used, so target version is now iOS 15.0.

- Disables debug log coloring, as the default terminal in XCode does not render that anyway, so logs are now
more readable there.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5473>
2023-11-01 03:46:25 +00:00
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