docview: rename paramater so as to prevent confusion with a global variable
docview: rename paramater so as to prevent confusion with a global variable

Settings is a global variable for RichView component. I renamed the
parameter Settings to ASettings so as to prevent any possible confusion
between the two.

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