[gtk] (29 commits) Created branch wip/matthiasc/popup2

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/popup2' was created.

Summary of new commits:

  4b2d921... Redo the idle sizer
  1783509... css: Use the new idle sizer
  0f655c6... widget: Use the new idle sizer
  802819d... window: Implement GtkRoot::check_resize
  33dafac... Introduce GtkPopup
  3be9b10... testpopup: Use a GtkPopup
  0722570... widget: guard popover-specific code paths
  b813db3... main: guard window-specific code paths
  4430d8d... Add a way to enumerate popups
  f04edb9... inspector: Show popups
  58307c1... root: Add default handling
  c145e3b... root: Add an activate_focus api
  95ef760... window: Implement GtkRoot::default-widget
  4e302ac... popup: Implement the GtkRoot::default-widget
  d71ed98... widget: Make grabbing default work for roots
  8fe4069... text: Make default activation work in roots
  c27bd4a... label: Make default activation work in roots
  9e60bde... root: Add api for mnemonics
  077fec6... window: Implement root mnemonic api
  af6dc20... popup: Implement mnemonics
  b383fec... label: Use root api for mnemonic setup
  20e6a6e... main: Use root api for mnemonic activation
  f01f5fc... popup: Add more keybindings
  22fa919... popup: Add backdrop
  93902fc... root: Add pointer focus apis
  889c317... window: Implement root pointer focus apis
  2001b64... popup: Implement root pointer focus apis
  46cc944... main: Use root pointer focus apis
  edc41ea... widget: Use root pointer focus apis