PropertyGrids appear almost invisible with gnome DE + dark theme

[UnknownShadow200]

The problem is that there are two 'colors' used for foreground text in controls - WindowText and ControlText

With a light / normal theme this is not an issue as both WindowText and ControlText produce black text

However with a dark theme, although WindowText is still black, ControlText appears as white and is hence almost impossible to read

Although this was fixed for ListBoxes in 5b774651e36eb7973b989ba5485085c83bcfcb93 by changing from ControlText to WindowText, unfortunately some parts of PropertyGrid are hardcoded to draw text using ControlText https://github.com/mono/mono/blob/bdd772531d379b4e78593587d15113c37edd4a64/mcs/class/System.Windows.Forms/System.Windows.Forms/PropertyGridView.cs#L621

So may not be possible to completely fix

EDIT: Also the category forecolor was buggy until recently - see mono pull request #19045 ([WinForms] Colorize PropertyGrid's Categories properly)