QColorDialog supports entering hex rgb values only with a leading #.
That makes copy/paste impossible whenever the copy source has plain
hex, without the leading #.
This patch automatically adds a leading # character, when missing.
As a drive-by, QObject::connect statements are altered to PTMF syntax,
amending 9eb1b9e86ce3d1004e39e8ab7c7ecb6796d6df1a.
The patch also adds an autotest for the new functionality.
Fixes: QTBUG-111742
Pick-to: 6.5
Change-Id: I4ced29dc8b543457f411a3fa0ac756b550cdb09f
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
b04f9388ac