Combobox margin fix
Combobox margin fix

When painting the combobox did not take into account that the margin applies
to both the left and right side of the combobox.

wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI