[gtk] (44 commits) Non-fast-forward update to branch gst.gl.win32

[Chun-wei Fan <fanchunwei src gnome org>]

The branch 'gst.gl.win32' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  a78c592... media/gstreamer: Support using GL for video for Windows
  93c5369... gtkgstsink.c: Support EGL on Windows as well
  d04df76... gtkgstsink.c: Fix up thinko
  ecedf94... gtkgstsink.c: Avoid g_setenv()
  1c5aa08... gtkgstsink.c: Win32: Limit GL API to gles2 when using EGL
  884a2b0... gstglsink.c: Some cleanups
  7925c38... gtkgstsink.c: Check GST_GL_HAVE_PLATFORM_EGL correctly
  ed7be6f... gtkgstsink.c: Call gst_gl_display_filter_gl_api() always on
  894291e... gtkgstsink.c: Determine GstGLAPI using GDK if needed

Commits added to the branch:

  620787e... Update POTFILES.in (*)
  0996552... demos: Clean up doc comments (*)
  2d0957b... docs: Clean up docs syntax (*)
  fff2b3c... gdk: Clean up docs syntax (*)
  2d266d1... gsk: Clean up docs syntax (*)
  91f7b96... gtk: Clean up docs syntax (*)
  fc9f580... docs: Update GSK_RENDERER docs (*)
  0bba361... docs: Avoid stairstepping (*)
  252edbd... docs: Fix a typo (*)
  b617ba1... docs: Refer to backend APIs (*)
  786e28f... filter: Cosmetic docs changes (*)
  8761048... sorter: Cosmetic docs changes (*)
  9a7e4f4... eventcontroller: Cosmetic docs changes (*)
  2d12a7d... directorylist: Cosmetic docs changes (*)
  6cb4dda... gdk: Cosmetic docs changes (*)
  b35e02d... shortcutscontroller: Cosmetic docs changes (*)
  13a9348... widget: Cosmetic docs changes (*)
  3ab34ff... text: Cosmetic docs fixes (*)
  74a39bb... textview: Cosmetic docs changes (*)
  f5f8f83... textbuffer: Cosmetic docs changes (*)
  09244ed... expression: Cosmetic docs changes (*)
  fe56431... sortlistmodel: Cosmetic docs changes (*)
  601a8de... treemodel: Cosmetic docs changes (*)
  40f292c... docs: Sync up debug flag information (*)
  8bcc6b1... docs: Fix up syntax (*)
  71aac48... docs: More syntax fixes (*)
  be94405... docs: More syntax fixes (*)
  226edf1... Merge branch 'matthiasc/for-master' into 'master' (*)
  052917a... label: Fix mnemonic activation (*)
  8828932... floxbox: Fix focus navigation (*)
  105b12f... togglebutton: Fix mnemonic activation (*)
  eb61f0f... treeexpander: Use focusable where we mean it (*)
  281bb5e... treeviewcolumn: Use focusable when we mean it (*)
  21057fb... Merge branch 'focusable-fixes' into 'master' (*)
  52d1c0c... media/gstreamer: Support using GL for video for Windows
  3f802a8... gtkgstsink.c: Support EGL on Windows as well
  0270b47... gtkgstsink.c: Fix up thinko
  a9d0789... gtkgstsink.c: Avoid g_setenv()
  cb52842... gtkgstsink.c: Win32: Limit GL API to gles2 when using EGL
  8727088... gstglsink.c: Some cleanups
  2e80ccf... gtkgstsink.c: Check GST_GL_HAVE_PLATFORM_EGL correctly
  e0b869e... gtkgstsink.c: Call gst_gl_display_filter_gl_api() always on
  bde0f48... gtkgstsink.c: Determine GstGLAPI using GDK if needed
  8999f28... media-gstreamer: Provide fallback mode for playback

(*) This commit already existed in another branch; no separate mail sent