Don't pass screen coordinates to drawScrollBar()

The scroll bar always spans the content area of the screen: the
position and height depend only on the theme and not on who is
drawing it.

Note that the coordinates passed were wrong in most cases, so this
commit fixes the scroll bar positioning for several dialogs.

src/settingsdialog.cpp

@@ -122,9 +122,7 @@ bool SettingsDialog::exec() {
 		}
 		gmenu2x->s->clearClipRect();
 
-		gmenu2x->drawScrollBar(
-			numRows, voices.size(), firstElement, clipRect.y + 1, clipRect.h
-		);
+		gmenu2x->drawScrollBar(numRows, voices.size(), firstElement);
 
 		//description
 		writeSubTitle(voices[sel]->getDescription());