Update from ChangeLog
src/printwx.cc: Fix printing with wx3.0 - 0 width lines don't appear
(before they would be as thin as possible) and we need to reset the
brush after setting it to transparent to draw a non-filled ellipse.
src/printwx.cc: Set the clipping region after we draw the page
border and info box to avoid clipping the border in print preview.
src/printwx.cc: Move the numbers below the scale bar down a little
so that they don't overlap the scale bar ticks.
src/printwx.cc: Tidy up the appearance of the "compass" and
"elevation on" arrow.