The parameter "inFocus" was being given the opposite of what the name
implies: it was being set to false when in focus, and true when not in
focus.  This fixes that confusion.

Fixes a bug where the hotkey inject would trigger hotkeys despite
hotkeys being disabled when in focus.

It's a waste of GPU time to do two fullscreen passes to render final mix
previews. Use blend states to simulate the black background of
DrawBackdrop() for the following situations:

- Main preview window (Studio Mode off)
- Studio Mode: Program

This does not effect:

- Studio Mode: Preview (still uses DrawBackdrop)
- Fullscreen Projector (uses GPU clear to black)
- Windowed Projector (uses GPU clear to black)

intel GPA, SetStablePowerState, Intel HD Graphics 530, 1920x1080

Before:
DrawBackdrop: ~529 us
main texture: ~367 us (Cheaper than drawing a black quad?)

After:
[DrawBackdrop optimized away]
main texture: ~383 us

As the names entered into this dialog can be used as part of file names
(for example, saving a scene collection), allowing long names can result
in silent data loss where OBS creates the collection and allows the user
to manipulate it, but it cannot be saved on exit. This is due to the
MAX_PATH limitation on Windows (260 characters). 170 was chosen to
accomodate the length of the user app data folder plus some room for
extensions like .json.tmp.

Closes #1966

The signal is actually called toggled(bool) and not just toggled(). Qt considers these two to be different signals.

Adds support for pausing recordings.  When settings are eligible for
recordings, a pause button will appear next to the recording button.  If
the settings are not eligible, it will warn the user in the output
settings that they cannot pause recordings if those settings are used.

Allows the ability to pause when streaming and recording use the same
tracks in advanced output mode.

Code submissions have continually suffered from formatting
inconsistencies that constantly have to be addressed.  Using
clang-format simplifies this by making code formatting more consistent,
and allows automation of the code formatting so that maintainers can
focus more on the code itself instead of code formatting.

This reverts commit 8a22889e.

After further usage, result is undesirable.  We don't need the theme
applied to projectors.

Similar to item_visible, this event fires whenever a scene item is
locked or unlocked. This allows the UI and libobs to remain in sync
regarding scene elements' statuses.

Fixes a bug where if the user gave a custom color to a source list item,
the edit box used with renaming the item would also have that
background color while editing the name, awkwardly.

If the user gave the source list item a custom color, the "background"
stylesheet value would apply to children of the item widget, causing the
lock/eye checkboxes to also have that background color added on top of
the chosen color.  This is fixed by explicitly settings the background
value to none on the lock/eye checkboxes.

Apparently certain versions of Qt have a bug where the tray icon's
internal "visible" variable is set to false despite the fact that it
still shows.  Calling show() first before calling hide() sets the
internal boolean value and fixes the issue with the hide call.

Previously, if the video size in OBS was too big, the labels would not
render on macOS/Linux due to the labels not fitting inside the texture
in the freetype plugin. This change makes it so that there is a maximum
size for the label, rather than being solely based on video size.

This change also makes the labels look centered on macOS/Linux, as
unlike the GDI plugin on Windows, the freetype plugin aligns the bottom
of the text with the bottom of the source.

Twitch will now return a 403 HTTP error code if you attempt to query
your stream key when your Twitch account does not have two-factor
authentication enabled.  This handles it a bit better and displays an
appropriate error message for users so they know where to go to enable
it.

Allows the ability to use things such as links in warning dialogs,
optionally.  Disabled by default.

This can take a while on a hard drive since it hashes the entire OBS
installation, show a undetermined progress marquee to avoid users
thinking that the updater has frozen.

This fixes a pixelated font on high-DPI