Start deprecating some GtkStock API
Fix a couple documentation warnings
window: Make process_updates faster

Only look at "impl" windows in gdk_window_process_updates_with_mode()
since these are the only ones we care about.  This avoids a lot of
unnecessary calls to g_list_copy() and g_object_ref().
Deprecate and ignore gtk-button-images setting

Button images can still be enabled selectively by the app author
using the always-use-image property on the button.
Revert "Remove the show-unicode-menu and show-input-method-menu settings"

Removing object properties is too much of an API break, even for
properties we don't expect to be used outside of GTK itself.

This reverts commit 8b811b623c387b99d42fb065535d5f6a05d52fa5.
settings Deprecate properties

Deprecate the properties that were brought back from the dead in the
last patch.
gtk-demo: Remove unused variable
gtk-demo: Fix compile warnings
testsuite: Ignore deprecation warnings
tests: Ignore deprecation warnings
wayland: Add missing symbol export

gdk_wayland_window_set_use_custom_surface was not being exported
correctly.

https://bugzilla.gnome.org/show_bug.cgi?id=695861
Updated POTFILES.skip
Deprecate and ignore gtk-menu-images setting

GtkImageMenuItem images can still be enabled selectively by the app author
using the always-show-image property on the item.
Deprecate and ignore gtk-enable-mnemonics and gtk-auto-mnemonics" properties

They are both enabled by default.
Mark gtk-color-palette as deprecated

It is only used by the deprecated color selector widget.
Deprecate and ignore gtk-can-change-accels

It is disabled by default
Deprecate and ignore the cursor blink settings

And hardcode them to reasonable values.
Deprecate and ignore gtk-fallback-icon-theme

The standard icon themes have built in fallbacks.
Deprecate and ignore gtk-scrolled-window-placement

Just use GTK_CORNER_TOP_LEFT and allow it to be changed with
gtk_scrolled_window_set_placement().
Deprecate and ignore gtk-menu popup and popdown delay settings

Just pick good defaults. The a11y team confirmed that they don't
rely on them.