Gtk-Warning whilst running.

[softgrow]

Whilst running from R-Studio on OSX I get the odd warning in the console, that should probably not be there. There is no apparent visual defect in the RQDA window.

Sample errors (get many blue, less underline and only a few gold):

(R:58961): Gtk-WARNING **: 22:02:14.015: Unknown tag `blue'
(R:58961): Gtk-WARNING **: 22:02:14.106: Unknown tag `gold.background'
(R:58961): Gtk-WARNING **: 22:02:14.106: Unknown tag `underline'

Configuration is OSX 10.14.2, RStudio 1.1.463, R 3.5.2, gtk 2.10.0, not using X11