Log Message:
Update gtk3 to 3.10.7

Overview of Changes in GTK+ 3.10.6 to 3.10.7
============================================

* Bugs fixed:
 386569 GtkFileChooser enters first file name into the entry...
 709491 dark theme setting not propagated to vertical spinbu...
 711298 "Edit Scheduled Transaction" window way too modal
 719314 gdk_property_change segfault on multiple X protocol...
 719970 Fails to build: gdkevents-quartz.c:1692:58: error: ...
 719977 Can not use GtkFileChooserDialog: assertion failure
 721700 invalid callback prototypes leads to test issues
        win32: add more width to the slider to not cut it w...
        win32: add margin to scale trough
        win32: set color for scale marks
        win32: scale slider with marks was off by 2 pixels
        win32: handle again gtk-font-name

* Translation updates:
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