TabBarCoordinator: Retain and restore the last used tab when VLC starts

This commit makes VLC store the last used tab into User Defaults, which is a hack.

I tried using Apple state retainment API, see Preserving Your App's UI Across Launches, but could not restore the state after saving it.
I think the TabBarCoordinator needs some rework to :

• inherit UIViewControllerRestoration;
• override decodeRestorableState and encodeRestorableState correctly.

added Feature label

See #668 (closed) I believe.

added 18 commits

• b21fa7ad...6234fe1f - 17 commits from branch videolan:master
• 8d164739 - TabBarCoordinator: Retain and restore the last used tab when VLC starts

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approved this merge request

@edrflt requires rebasing

approved this merge request

added 46 commits

• 8d164739...ddd80946 - 45 commits from branch videolan:master
• 5d2e35e5 - TabBarCoordinator: Retain and restore the last used tab when VLC starts

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added 1 commit

• 33d67b87 - TabBarCoordinator: Retain and restore the last used tab when VLC starts

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added 3 commits

• 33d67b87...eb888e74 - 2 commits from branch videolan:master
• 2086172c - TabBarCoordinator: Retain and restore the last used tab when VLC starts

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changed milestone to %3.3.0

I'd like to see this merged. Any opposition?

changed the description

added 2 commits

• 2fb0bb29 - 1 commit from branch videolan:master
• 581a6eed - TabBarCoordinator: Retain and restore the last used tab when VLC starts

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added 3 commits

• 581a6eed...0a96c9f7 - 2 commits from branch videolan:master
• f94fc88a - TabBarCoordinator: Retain and restore the last used tab when VLC starts

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added 1 commit

• 4467a391 - TabBarCoordinator: Retain and restore the last used tab when VLC starts

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added 3 commits

• 4467a391...0a96c9f7 - 2 commits from branch videolan:master
• 6bf98230 - TabBarCoordinator: Retain and restore the last used tab when VLC starts

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enabled an automatic merge when the pipeline for 6bf98230 succeeds

merged

mentioned in issue #956 (closed)