Disable grid while editing a cell

Signed-off-by: Jean-Marc.Levecque <jmarc.levecque@bbox.fr>
Merge branch 'develop' of https://github.com/graemeg/fpGUI.git into develop
Merge branch 'develop' of https://github.com/graemeg/fpGUI.git into develop
Fix bug in InternalListBoxSelect

Signed-off-by: Jean-Marc.Levecque <jmarc.levecque@bbox.fr>
Merge remote-tracking branch 'jmarcl/editcombo' into develop
Merge remote-tracking branch 'github/develop' into develop