Separation of the controls dock from the main window

[tytan652]

Description

Depends on:

• UI: Refactor Virtual Camera source selector dialog #7169

Moves the controls dock UI outside of the main window UI.
And make OBSBasic no longer rely on UI element from the controls dock.

Also adds replay buffer buttons and the pause button in the UI file, those are no longer manually and programmatically created and deleted.

Motivation and Context

This PR has two purpose:

• RFC 47, Switch to Advanced Docking System
• Allow replacement of this dock to be easier to implement like UI: Add main toolbar to top of window #6421 by relying on new signals and slots.

How Has This Been Tested?

I tried to test all the feature of the dock, but please test it yourself too.

Need also some testing about what 2d60c89 was fixing because we no longer rely on UI elements.

Types of changes

• Tweak (non-breaking change to improve existing functionality)

• Code cleanup (non-breaking change which makes code smaller or more readable)

• Refactor for future features

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[tytan652]

Remove from the milestone, because it is related to the RFC about MVC.
obsproject/rfcs#53

[tytan652]

The PR has been entirely refactored, it still miss appearance/theming bits for the small buttons of the dock.

[tytan652]

Renamed noncheckable-buttons.hpp to noncheckable-button.hpp.

[RytoEX]

I'll give this a test later.

[RytoEX]

After rebasing, this failed to build due to previous changes in UI/window-basic-main.cpp to void OBSBasic::StartStreaming():

	auto setStreamText = [&](const QString &text) {
		ui->streamButton->setText(text);
		if (sysTrayStream)
			sysTrayStream->setText(text);
	};

The compiler error was:

no member named 'streamButton' in 'Ui::OBSBasic'

This is obvious in hindsight because this PR moves streamButton from OBSBasic to OBSBasicControls. To get this to compile, I removed this line:

obs-studio/UI/window-basic-main.cpp

Line 7044 in 0cc357f

ui->streamButton->setText(text);

This does mean that the "Preparing..." text will no longer be shown on the "Start Stream" button. I'm not sure what to do about that.

[tytan652]

I added a commit that removes the lamdba, moreover StreamingStarting behavior got split in two by #10633 with a new setText which required moving a signal call and add a new one.

[RytoEX]

I added a commit that removes the lamdba, moreover StreamingStarting behavior got split in two by #10633 with a new setText which required moving a signal call and add a new one.

Thanks for that. Will re-review shortly.

[RytoEX]

Gave a quick review and local build/run test after the recent force push. Seems fine.