This change adds a property to the shellsettings plugin to allow
changing the number of columns in the QuickSettings drawer in the top
panel. It defaults to the current value, 3.
This will allow us to accommodate for wider displays where the current
drawer unnecessarily paginates (and thus hides some of) the
quicksettings.
Minimum is still 3 since that it computes in the drawer code (and
currently not necessary to change), maximum is somewhat arbitrarily, 7.
Signed-off-by: Sebastian Kügler <sebas@kde.org>
This (partially) reverts commit 127bbdf653.
Only incorrect changes from Kirigami.Units.largeSpacing to
Kirigami.Units.gridUnit are reverted. Only Plasma.Units were buggy.
