[gtk] (30 commits) Non-fast-forward update to branch wip/sadiq/fixes

[Mohammed Sadiq <pksadiq src gnome org>]

The branch 'wip/sadiq/fixes' 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:

  493c801... overlay: Add support for clipping overlay widgets

Commits added to the branch:

  542ad4f... gtkmain: Add gtk_is_initialized() (*)
  2f181df... gtkmain: Add gtk_get_main_thread() (*)
  bd2e3f5... Add aligned allocator support to meson (*)
  8e74eb3... Add aligned allocator functions to GSK (*)
  a394a86... Use aligned allocators for GskRenderNode (*)
  d8c8a25... Update POTFILES.in (*)
  ef2daa3... Update Polish translation (*)
  c02bc22... Use aligned allocators for GtkSnapshot (*)
  10b2f65... Fix wrong format strings in various places (*)
  58fc122... Remove unused variables (mostly in W32 code) (*)
  aaa4e23... Fix gdk_win32_cairo_context_end_frame prototype (*)
  bc47fa2... Fix various type mismatch warnings (*)
  0e1710a... Remove some more unused variables (*)
  8bd6936... Fix signedness issues, remove unused code (*)
  f0103ee... Remove unused functions in W32 backend (*)
  1e2ab40... Fix a missing default case warning (*)
  cacdef8... A quick and dirty fix for a circular allocation issue (*)
  3acd26c... Fix more signedness issues in W32 backend (*)
  93f8f3c... Remove unused code in gdksurface-win32.c (*)
  e73dc5c... Fix a warning about uninitialized variable (*)
  cddc9ff... Fix a typo in W32 event-handling code (*)
  411c535... Fix some warnings in W32 part of gtkmain (*)
  43d6fe2... Fix missing default switch cases in gtkimcontextsimple (*)
  9330be8... Fix missing default switch case in DllMain (*)
  0365dad... See if _MSC_VER is defined before checking its value (*)
  43f3789... Use correct stat struct for ftw() (*)
  bc13a58... Merge branch 'lrn/aligned-alloc' into 'master' (*)
  c047e97... Merge branch 'master' into 'master' (*)
  4f63229... Merge branch 'lrn/gtk4warnings' into 'master' (*)
  5fb1c02... overlay: Add support for clipping overlay widgets

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