The user can add a flag to the style, for all widgets, to supress
the display of the numeric value.
Added new widget method drawNumValue() to simplify the code,
which can also be called by the user, e.g. for a custom numeric
value location.
Added WIDGETSTYLE2 (like 0, but vertical) and WIDGETSTYLE3 (like 1, but
vertical). NOTE: I don't have a build environment, so I can't even
promise this will compile! So if it's crap, just treat it as a concept
for an enhancement request!
