2019-09-17  Matt Bisson  <mbisson@mbisson-devd1>

	Fix ignored Motif scrollbar resources

	* src/xterm.c (x_create_toolkit_scroll_bar): On Motif scrollbars,
	"foreground" has no meaning, while "background" means the truck and
	arrow colors, and "trough" means the background of the entire widget
	(bug#37359) I have hooked up the Emacs scrollbar "foreground" color to
	the XmNbackground resource, and the "background" color to
	XmNtroughColor.  This is more in line with how Xaw scrollbars behave.