mrv2 v1.1.5

This is a critical update for Windows, Linux and macOS users.

It was re-released on May 6, 16:20 PM Argentina time.

It is a bug fix release for the regressions in v1.1.4 and early versions of v1.1.5 which were rushed:

• Added a FAQ on the documentation about Linux XWayland and Wayland on
  why it could make playback slow if your OS was not configured properly.
• This is the first version that supports Wayland and XWayland.
  For instructions on how to set XWayland and Wayland on Ubuntu 22.04.4 LTS
  with NVidia drivers, please see Help->Documentation the FAQ section.
• Fixed annotations not showing when Blit Viewports was on.
• Fixed hiding of pixel bar sometimes failing even when:
  Playback->Auto Hide Pixel Bar
  and:
  Playback->Auto Playback was on.
• Fixed not hiding of the pixel bar when the image was open from the
  recent menus or from the command-line.
• Fixed color buffers not taking full advantage of OpenGL improvements on
  Windows mainly.
• Fixed incorrect positioning and resizing of the images on loading
  which would crash Wayland.
• mrv2 can now be built with the pre-installed python, without having to
  build python itself. Of course, in that case, mrv2 cannot be re-distributed.
  Tested on Linux and macOS only for now.
• Added a python translating system for plug-ins.
• Translated all update-mrv2.py strings into Spanish.
• If using blit for the viewports, automatically switches to shaders if
  Background is transparent and image has transparency, as glBlitFrameBuffers
  does not support alpha blending.
• Panel->Settings->Default Settings now warns the user about it and asks
  for confirmation.
• Moved Panel->Settings->Default Hotkeys to Window->Hotkeys.
• Added Window->Preferences->Default to reset the user preferences to their
  default.
• Cleaned up source code of passing ui pointer to several classes, using
  App::ui instead.
• Removed .po python plug-in files from package distribution.
• Improved missing_translate.py script and added searching for plug-in
  translations too.
• Removed unused FLU XPM icons from the code, as most have been replaced by
  .svg icons.
• Fixed Edit Viewport Clip Info and Device Info not respecting the device
  pixel ratio when the Edit button was pressed.
• Fixed macOS crashes with preview thumbnail.
• Fixed timeline redraw issues.
• Respect last configuration of Timeline/ClipInfo and Timeline/TrackInfo.
• Removed debugging statements from Linux packages on a re-relase.