[fixed] 'Choose color' dialogue crashes (Win10 -64)

[greytery]

I see the #12 'Choose color' custom one with the Alpha slider not the #13 'Color' OS dialogue.

However, when I am in the 'Choose color' dialogue, and click on the top blue rectangle (i.e. not the sliders) I get the OS 'Colour' dialogue. Clicking in lower rectangle (i.e. current setting) has no effect.

(Note, I am in en-GB land, so Win10 OS dialogue says it's 'Colour' - just saying. )

tery