[gtk] (9 commits) ...Merge branch 'wip/carlosg/public-legacy-controller' into 'master'

[Timm Bäder <baedert src gnome org>]

Summary of changes:

  0f4a6bf... gtkeventcontrollerlegacy: Make public (*)
  bb0e964... testsuite: Fix gestures test (*)
  55b32c8... gtkwidget: Drop obsolete code (*)
  65fbd0a... tests: Remove ::event handler in testwindowsize (*)
  3c73f70... tests: Use GtkEventControllerMotion in testpopup (*)
  21d0e30... testsuite: Fix gestures tests for the legacy controller (*)
  dd6aa7b... tests: Drop ::event handler in testgtk (*)
  f367468... tests: Drop "saved positions" test in testgtk (*)
  60b0f48... Merge branch 'wip/carlosg/public-legacy-controller' into 'm

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