The program can get stuck waiting for the browser within a event queue,
so instead mark that the program is closing, do it in a separate thread,
signal the window when it's finished, and then check whether it's in the
process of closing before actually showing the dialog.

When enabling "local file", and the local file path is empty, CEF can
trigger an assert, causing a crash.

The fix for the race condition that was made in 432017b2 also broke
audio lines.  This fixes audio lines and moves the fix to just the case
where it actually applied.

Fixes an issue where the manual transition point would not be reset to 0
when the transition's current target is overridden and explicitly set.

This reverts commit 9cff2ae6.

This reverts commit 6d5bb8b2.

(This commit also modifies the UI)

Adds the ability to schedule tasks for certain threads

UI: Increment filter name automatically

Fixes a group id comparison where it was comparing the pointer of the
group name rather than the string contents itself, causing it to treat
it as a non-group source.

Instead of erroring out completely when it can't determine if the
certificate is valid, proceed anyway.  This matches how web browsers
treat failed cert revocation checks.  schannel just has somewhat
paranoid defaults.

Reduces debugging spam when debugging Vulkan capture is needed in the
hook.

win-capture: Vulkan surface refactor

UI: Support Unicode for Windows fullscreen projectors

UI: Fix filter rename crash

tests: fix Windows compile error

Make sure HWND tracking is cleaned up when Vulkan surfaces are
destroyed. Also use unbounded linked list to fix games that leak
surfaces on Alt+Tab like Doom.

Also replace CRITICAL_SECTION with SRWLOCK, both for claimed speed
benefit, and to remove initialization code.

Errors in obs_scene_add_internal would cause a crash as the null item is
passed to various signal handlers.

This ensures that windowing-related VST actions are performed in the
main UI thread rather than in another thread, risking a lockup.

This reverts commit 4da73445.

This is being reverted because apparently it causes flickering displays
for some people.  Bad drivers or something?  Not sure.  Very annoying.

Just makes sure to be explicit when a device isn't valid.

win-capture: Handle vkCreateSwapchainKHR errors

Fixes behavior for an application reported by AMD.

Certain UWP programs can't obtain a normal window handle from their API
for whatever reason (this was observed with minecraft win10 edition), so
if the normal window handle on the map fails, try window handle 0
instead.

Ensures that the UWP program can open the keepalive mutex to check to
see whether OBS is still alive.  Fixes a bug where UWP programs wouldn't
capture.

Fixes a race where the audio subsystem could call audio render callbacks
before the source was fully initialized.

The id of the source was being pointer compared rather than string
compared, so naturally with the source versioning system where the
string is duplicated, the pointers no longer matched.

When someone adds a source and the plugin is removed for whatever
reason, it would cause a crash with the new source versioning system.
This fixes that by ensuring the unversioned id is also backed up along
with the normal id.