GtkHeaderBar: Allow overdrawing

The draw function of GtkHeaderBar was returning TRUE, causing
after-signal handlers to not run. This breaks e.g. drawing of
dnd hightlights. Fix that.
listbox: check gsequence end iter in get_row_at_index
Updated Belarusian translation
GtkApplication: Clarify docs a bit

Explicitly mention how gtk_application_set_accels_for_action can
be used to remove all accelerators for an action.

https://bugzilla.gnome.org/show_bug.cgi?id=729451
Small documentation fixes

Pointed out in
https://bugzilla.gnome.org/show_bug.cgi?id=729461
Small documentation update

Don't show an example that doesn't work anymore.
css: Split out a common function

It's used in two places already, and Iwant to use it in a third one.
css: Fix printing code for CSS strings and idents

It used to infloop on special characters.
tests: Add test for latest patch

This tesst infloops without it.
applicationwindow: Properly unmap the menubar widget
combobox: Add workaround so evolution doesn't crash

Removing the NULL checks in 7f60cab47d9651ed3ed53b86f1f74de71b55eee0
caused evolution to crash. It chains up with NULL and that used to work.

This patch should be reverted for GTK 4.0.

https://bugzilla.gnome.org/show_bug.cgi?id=729496
a11y: Disable deprecation warnings in AtkMisc implementation
GtkColorButton: Fix recursion loop in "use-alpha" set_property()
a11y: Avoid a warning

The listbox row accessible code was giving warnings when
parent is NULL, at destruction time.
docs: fix typos in gtk_file_chooser_set_local_only

Change "file are files" to "file or files." Also remove an excessive
"file" in "file system."

https://bugzilla.gnome.org/show_bug.cgi?id=729473
docs: Fix name of GtkFileChooser's Create Folder button

The documentation for GtkFileChooser references the button which allows
the user to create new folders as the New Folder button, although the
label actually says Create Folder.

Update the documentation to say Create Folder instead of New Folder.

https://bugzilla.gnome.org/show_bug.cgi?id=729475
viewport: Don't subtract borders and padding from -1

-1 is a special value for "undefined" and needs to stay that way

https://bugzilla.gnome.org/show_bug.cgi?id=729607
Bloatpad: port to new accel api
wayland: Fix c&p typo in touch capabilities handling.
widget-factory: add linked entry and button example