mate-search-tool: open folder menu item can be misleading

Based on gnome-utils commits:
88159d1da89940d062057450e92aa191e364488b
b703b0b28e441c15c5416f01670b4b747768e980
From: Dennis Cranston <dennis_cranston@yahoo.com>
Gnome Bug: https://bugzilla.gnome.org/show_bug.cgi?id=619499
Fix typo (G_TYPE_INSTANCE_CHECK_TYPE -> G_TYPE_CHECK_INSTANCE_TYPE)

Based on gnome-utils commit: 0bf63957d9ea7055b56332d567966701db99ccb5
From: Piotr Eljasiak <epiotr@src.gnome.org>
mate-screenshot: Several fixes taken from gnome-screenshot

Code taken from commits:
screenshot: Rewrite event handling in area selection
772b9cc0774468ea21addb85ef843ee8dfef9e00

screenshot: add a workaround to avoid capturing the selection window
745eea03a3092fa055f76132971e3dd2bb4e8737

screenshot: Don't snap the selection
13741db3522aaac8be732567bca00d9c81929b72
Add missing #include <config.h> to make translations work

Based on gnome-utils commit: 95edffa91ed559515d659187baba6ec7806b251b
From: Kjartan Maraas <kmaraas@gnome.org>