Feature Request: Add proper color picker (e.g. QColorDialog)

[henrify]

Currently, at least on Windows, the Fore Color and Back Color in "Filters" dialog are implemented as drop down menu, with small number of predefined colors.

Would be great to able to choose the colors freely, using proper color picker.

QT's built-in QColorDialog (http://doc.qt.io/qt-5/qcolordialog.html) seems like a very easy way for doing this. Thanks!

[variar]

Looks like this is done in PR #194.

[henrify]

Ah cool, i only checked open issues against duplicates.

Interesting timing though, glogg has been around for almost a decade, and then in span of two days there is independently a PR and a feature request about exact same thing.