[meld] (9 commits) ...Merge branch 'windows-fixes' into 'master'

[Kai Willadsen <kaiw src gnome org>]

Summary of changes:

  a94df20... settings: Handle missing GNOME desktop schemas for font set (*)
  01f1617... CI: Update mingw packages (*)
  be1fe17... Update win32 setup to use non-deprecated executable options (*)
  138c4c6... Remove pseudo-Python-2 support for error display (*)
  da79fce... build_helpers: Fix windows build for cx_Freeze internal cha (*)
  8f4f57e... sourceview: Handle clipboard request failure when pasting (*)
  e1a85f8... misc: Remove unused function (*)
  5024c8f... misc, vc._vc: Request no visible console window on Windows  (*)
  ac02fe2... Merge branch 'windows-fixes' into 'master'

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