[gtk] (28 commits) Non-fast-forward update to branch wip/otte/memoryformat

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/memoryformat' 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:

  61b8df3... texture: Refactor downloading

Commits added to the branch:

  c7d6bf7... filechooserportal: Take a ref on transient-for (*)
  db37452... Merge branch 'fix-filechooser-portal-crash' into 'master' (*)
  0775e21... Add support for pango markup in menu items (*)
  9f1e9b6... Merge branch 'wip/cdavis/menu-item-markup' into 'master' (*)
  30164d5... css: Render the background-clip area, not the background-or (*)
  222d927... Merge branch 'wip/otte/for-master' into 'master' (*)
  4f53645... ngl: fbo 0 has no color attachment (*)
  3b9967d... ngl: Compute correct renderformat (*)
  c6dd3c1... glcontext: Add GdkGLContext::allowed-apis (*)
  8c1f7f7... glcontext: Deprecate gdk_gl_context_set_use_es() (*)
  f584d4f... gl: Check allowed APIs in realize() (*)
  76420d7... ngl: Fix glTexImage2D() usage on GLES (*)
  e974a04... glcontext: Add gdk_gl_context_get_api() (*)
  5c1e402... Merge branch 'wip/otte/for-master' into 'master' (*)
  27573d9... Merge branch 'wip/otte/glcontext' into 'master' (*)
  db167e0... Update Basque translation (*)
  e371bd0... ngl: Use the right value (*)
  b4ab9f7... testsuite: Add a test targeting GL upload code (*)
  27b5dc1... gl: Fix broken internal format (*)
  caddea4... gl: Set stride properly in fallback (*)
  780ae52... gl: Check the stride is a multiple of the bpp (*)
  d4959a9... gl: Make sure to set a proper alignment (*)
  e581c14... testsuite: Add run for GLES (*)
  5311616... Merge branch 'wip/otte/gles' into 'master' (*)
  0bf38eb... texture: Refactor downloading
  8238e36... png: Do loader conversions in GDK
  556699f... Add private memory formats used by libpng
  20f8582... png: Refactor png saving

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