Printing: calculate a much more accurate font scale value

This simply uses the relative size of the profile. This can result in
truly tiny text in print, but at least it's consistent and logical.
We could add some minimum value there but I'm not sure that's the right
answer, either.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

printer.cpp

@@ -61,11 +61,11 @@ void Printer::render(int Pages = 0)
 	int profileFrameStyle = profile->frameStyle();
 	int animationOriginal = prefs.animation_speed;
 	double fontScale = profile->getFontPrintScale();
+	double printFontScale = 1.0;
 
 	// apply printing settings to profile
 	profile->setFrameStyle(QFrame::NoFrame);
 	profile->setPrintMode(true, !printOptions->color_selected);
-	profile->setFontPrintScale(pageSize.width() * 0.001);
 	profile->setToolTipVisibile(false);
 	prefs.animation_speed = 0;
 
@@ -81,8 +81,10 @@ void Printer::render(int Pages = 0)
 
 	QSize originalSize = profile->size();
 	if (collection.count() > 0) {
+		printFontScale = (double)collection.at(0).geometry().size().height() / (double)profile->size().height();
 		profile->resize(collection.at(0).geometry().size());
 	}
+	profile->setFontPrintScale(printFontScale);
 
 	int elemNo = 0;
 	for (int i = 0; i < Pages; i++) {