QColorDialog wrongly exposes pickable region when translated

Note: bug not apparent in C/English locale.

When translated (German translation is a good example), the QColorDialog widens due to  longer button labels. That exposes a region in the middle of the dialog (between predefined colors and the color picker) that is click sensitive but shouldn't be, screwing up color settings if the user clicks on it inadvertently.

Please find attached a pyside2 script that sets wide button texts to expose the bug (note that this doesn't make this a pyside related bug, just meant for the ease of verification without locale dependency) and a screenshot where the erroneous click-sensitive region is marked in red.