places-sidebar: follow the remember-recent-files GSetting

https://bugzilla.gnome.org/show_bug.cgi?id=693705
ui: specify accelerators=true for our menu definitions

This will make GtkMenuButton do the right thing and show accelerators in
the popup.
Thanks to Juanjo Marín for the fix.

https://bugzilla.gnome.org/show_bug.cgi?id=680962
Updated Spanish translation
eel: use G_APP_INFO_CREATE_NEEDS_TERMINAL to run command in terminal
Updated Uyghur translation

Signed-off-by: Gheyret Kenji <gheyret@gmail.com>
Updated Serbian translation
Updated Galician translations
Updated Polish translation
l10n: Updated Italian translation
places-sidebar: add a Format menu item for volumes

This runs gnome-disks with a commandline that just sets the format
dialog as transient for the Nautilus toplevel.

https://bugzilla.gnome.org/show_bug.cgi?id=687093
release: prepare for 3.7.90
Updated Serbian translation
Updated Spanish translation
search-provider: fix activation behavior

It was unintentionally changed from opening the default application for
the result to selecting it in a view.
application: fix nautilus --quit

We should call g_application_quit() when we're asked to force quit.
Use an RGBA window for the desktop

In the future, GNOME shell will always render the background,
and handle transitions, etc. Nautilus will then just render
its icons on top.
desktop-window: don't signal we are handling the background

g-s-d won't listen to this root window property anymore, and we're not
actually rendering any background now. Don't set it.
canvas-dnd: don't use NautilusDesktopBackground

We only use it for DnD when receiving an image drop. We can copy that
code from NautilusDesktopBackground in a helper function.
desktop-canvas: don't use NautilusDesktopBacgrkound

We don't need to anymore.
Remove NautilusDesktopBackground

It's gone! \o/