This reverts commit 05b66262, reversing
changes made to 01df98b3.

This fixes an issue where an encoder may error out on a path that
doesn't use obs_encoder_set_last_error, resulting in a stale error being
used.

If we fallback to ffmpeg NVENC, the error from new NVENC might still be
present in the encoder structure. Given that this provides a lot more
actionable information to the user, let's use it if possible.

Fixes https://github.com/obsproject/obs-studio/issues/2807

obs-filters: Add a user label to the LUT filter

While discussing the Flatpak RFC [1], it was spotted that the
LUT filter couldn't open the file selection dialog. It was
explained, then, that the proper formats were either composed
of "User Label (file extensions)", or "file extensions", and
the LUT filter was setting "(file extensions)" without the
actual user label.

While this works on a standard Qt file selection dialog, it
cannot be properly formatted as a set of D-Bus filters, thus
breaking the sandbox integration.

Add a simple user label to the LUT file filter.

[1] https://github.com/obsproject/rfcs/pull/21#issuecomment-619106757

CI: Fix Azure Pipelines macOS runs

UI: Update OSX to macOS in English translation

rtmp-services: Add VirtWish service

rtmp-services: Update Stripchat streaming service

UI: Add white icons for dock titles

- Add pop-out and close svg icons
- Update all dark themes qss with the new icons

libobs-opengl: Fix viewport flip

This reverts commit f91d3baf.

From @pkv: the reason some of these vars were global is because Qt was not deleting them at all; as a result memory leaks have been reintroduced for: previewProjector, trayMenu, studioProgramProjector, multiviewProjectorMenu ;

Flip viewport in coordination with update_viewproj_matrix.

UI: Remove unnecessary global variables

CI: Add Github Actions workflow for branch pushes and PRs

mac-capture: Use window id to identify windows on MacOS

CMake: Build Windows modules with file descriptors

UI: Add status icons for recording and streaming

UI: Adjust a few margins

plugins: Build ALSA plugin for FreeBSD

-Remove 9px margins around central widget. This saves 18px of vertical
space. This will be helpful when the source context menu is added,
which is 24px tall.

-Adjusts margins in transitions dock. The top of the transitions dock
wasn't lined up with the top of the controls dock, which made it look
bad.

docs/sphinx: Add Property Grouping

UI: Fix previewLabel styling

UI: Remove all scenes in ClearSceneData

obs-qsv: Enable QSV texture-based encoding