Fixes https://obsproject.com/mantis/view.php?id=508

The toggle_visibility set only by init_hotkeys() call, but used each
time in obs_sceneitem_destroy() call.  Because zero hotkey_pair_id is
valid - we need to set item property other than zero here.

Closes jp9000/obs-studio#1000

After the commit 3491487c obs_frontend_get_streaming_output()
returns NULL if "Start Streaming" button not pressed yet.  The code
would erroneously fail to update the recording/streaming status if
either one of them hadn't been activated yet.

Closes jp9000/obs-studio#999

If there are no slideshow items and this function is called, it would
cause a null pointer dereference.

This is a workaround for build server cmake build issues on mac/linux.
In the future, the build servers should specify the cmake variable.

Prevents a conflict with potentially existing plugins

Prevents an issue where forks would continually request data from the
obsproject server for ingest updates.

The Twitch ingest lookup file did not initialize the dynamic array or
mutex before using.

Currently if a file is partially written to (eg, the file is opened for
writing but the write fails), the updater won't correctly roll back to the
previous version, leaving the OBS install in an inconsistent state.

We now track failed installs or hash failures on patched files with a new
STATE_INSTALL_FAILED state and properly roll back on errors.

When updating large files such as libcef, the patching process can take a
decent amount of time. Previously the progress bar would remain at 100%
after completing the downloads, so the user may think the updater has
frozen. Now it shows the process of the install / patching process.

enc-amf: Update to 2.2.2

Hotfix 2: Fixed an at-exit crash caused by an AMF trace function.

git obs-outputs: Change loglevel of ftl status thread to debug

The ftl output gets very spammy (3-6 lines every 5 seconds),
this commit changes the loglevel of those messages to debug
so they do not clutter up the logs of users.

In case these messages are needed they can be re-enabled using
the '--verbose' flag.

(also fixes minor formatting issues)

Changes "TransitionPoint" back to "Transition Point (milliseconds)" and
adds "TransitionPointFrame" locale when frame index mode is selected.

Add option to use frame instead of timestamp for stinger transition

Allows the user to specify a frame instead of a timestamp for
the transition point.

Allows getting (approximate) number of frames in a media file.

Same as 937ec4d5 but for advanced output.

Checks the output path is writable and checks for failure to start the
ffmpeg-mux subprocess.

Possible fix for: https://obsproject.com/mantis/view.php?id=923

If you close whole application (not just stats window) it skips the
close event and thus saving of the geometry.  The Qt::WA_DeleteOnClose
was set earlier.

Closes jp9000/obs-studio#984

UI: Fix settings window minimum width/height

UI: Update service names in autoconfig wizard

VFR encoding mode was originally added experimentally, but in truth,
it's nothing but a detriment because it can cause wild bitrate
fluctuations.  It's still a constant framerate even when VFR mode is on
anyway.

Instead of having an extra config button that essentially wastes
valuable window space, allow the ability to open advanced audio
properties from each audio meter config button.

Allows traversing/stopping the slideshow via hotkeys.

Split from jp9000/obs-studio#976

When the slideshow is deactivated (not shown to the stream), makes it so
that it can either continue playing regardless, pause, or restart the
slideshow when the source is activated (shown to the stream) again.

Split from jp9000/obs-studio#976

Allows the ability to make it so that a slideshow can stop when all
items have been shown.

Split from jp9000/obs-studio#976

With the newly released Driver 17.7.2, AMD fixed many reported issues and added some much wanted features:

- Pre-Pass and VBAQ are finally working,
- H265/HEVC content can distinguish between IDR- and I- Frames
- and also supports Color Range and Color Space now,
- and the 32-bit only text log crash was fixed.

And now it's time for the plugin to also be updated! This release primarily aims at adding support for AMF 1.4.4 and improving support for older drivers, with some of the recently discovered bugs and crashes fixed.

Hotfix 1: Fixed VBAQ and Pre-Pass being used with Constant QP, causing significant corruption issues and changed some default values for H265.

## Changelog
### 2.2.1
* Fixed a frame corruption bug with Constant QP caused by toggling VBAQ and Pre-Pass after it had already been applied.
* Changed the default value of 'Enforce HRD' to 'Enabled' for H265/HEVC encoding.
* Changed the default value of 'Deblocking Filter' to 'Disabled' for H265/HEVC encoding to fix corruption in strict decoders. (Premiere Pro, After Effects, Vegas, VLC (Software))

### 2.2.0
* Added support for AMF 1.4.4 and improved support for older drivers like 16.11.5 and 16.12.1.
* Fixed a memory corruption crash due to misuse of managed DirectX 11 objects.
* Fixed a frame corruption bug caused by applying 'VBAQ' and 'Pre-Pass' when using 'Constant QP' Rate Control Method.
* Fixed a string comparison bug causing Simple Output Mode to always use the Profile 'Constrained Baseline'
* Fixed a crash when enabling 'Debug' on 32-bit OBS caused by different type sizes.
* Fixed a crash with H265/HEVC caused by use of the undocumented Intra-Refresh properties.
* Changed the default value for 'Profile' to 'High'.
* Changed the default value for 'VBAQ' to 'Disabled' for improved performance.
* Changed the default value for 'Queue Size' to 8 for improved stability in spontaneous load situations.
* Changed the log crash work around to only apply to older AMF versions than 1.4.4.
* Removed unnecessary configuration changes.
* Removed unsupported Pre-Pass options 'Half Size' and 'Quarter Size'.