Add dynamic fonts to CNeutrinoFonts

- Dynamic fonts with their size matched to a given text box.
  The display size is retained even when changing the font size factor.
- "Normal" dynamic fonts, characterized by FONT_ID_SHARE in
  CNeutrinoFonts::getDynFont() can be used by several objects
  simultaneously. That is, if the calculated font size and font style
  are the same, the existing font is used.
- Dynamic font for exclusive application will only be used by an object.
  For this, a FontID (FONT_ID_xxx, defined in src/driver/neutrinofonts.h)
  in CNeutrinoFonts::getDynFont() is specified.
- Objects with dynamic font for exclusive application can resize at
  run time, the font size will be adjusted accordingly.
- The return value of CNeutrinoFonts::getDynFont() is a pointer
  to a font, for example:
  Font** font = CNeutrinoFonts::getInstance()->getDynFont(...);
  (*font)->RenderString(...)

src/neutrino.cpp

@@ -1525,6 +1525,7 @@ void CNeutrinoApp::SetupFonts()
 	if (neutrinoFonts == NULL)
 		neutrinoFonts = CNeutrinoFonts::getInstance();
 	neutrinoFonts->SetupNeutrinoFonts();
+	neutrinoFonts->refreshDynFonts();
 
 	/* recalculate infobar position */
 	if (g_InfoViewer)