dialog: Fix docs for GtkDialog

Responses need to be negative
GtkPlacesSidebar: support switching locations for XDS drag types

Make GtkPlacesSidebar also change locations when hovered
by XDS dnd targets (eg. dragging a file from file-roller).

Part of bug 707679
GtkPlacesSidebar: support open locations when dragging text

Make GtkPlacesSidebar also open locations when hovered by
text dnd targets.

Part of bug 707679
GtkPlacesSidebar: use gtk api to add dnd uri targets

Instead of hardcoding it in the dnd drop targets list.

Part of bug 707679
Revert "GtkPlacesSidebar: use gtk api to add dnd uri targets"

This reverts commit 7fa27dff259ad79d5a4364d7eaa6b63150082af3.
Revert "GtkPlacesSidebar: support open locations when dragging text"

This reverts commit 1b839d4b72a2cedb2bb633b5acd57239860693f4.
Revert "GtkPlacesSidebar: support switching locations for XDS drag types"

This reverts commit 588ffa8c3241eff2f8e2d99b911a6bcb539347bd.
Fix key "Page_Down" identified as "Next"

Since 49c4ad2f the order between "Page_Down" & "Next" had been changed (due to
sorting) and this resulted in the Page Down key being identified as "Next"
instead of "Page_Down"

"Page_Up" wasn't affected, since it comes before "Prior"

Signed-off-by: Olivier Brunel <jjk@jjacky.com>

https://bugzilla.gnome.org/show_bug.cgi?id=710411
Respect deprecated menu images setting

I have been convinced that it is a bad idea to change the behaviour
at the same time as deprecating it, so go back to respecting the
Gtk/MenuImages xsetting in GtkImageMenuItem when it is set.

The setting as well as the widget are still deprecated, and the
default value of the setting will remain FALSE.
Respect deprecated button images setting

I have been convinced that it is a bad idea to change the behaviour
at the same time as deprecating it, so go back to respecting the
Gtk/ButtonImages xsetting in buttons created with
gtk_button_new_from_stock() when it is set.

The setting as well as the function are still deprecated, and the
default value of the setting will remain FALSE.
Update expected results for some a11y tests

These are affected by recent changes to stock icons (adding
accessible names) and spinner sizing.