Start using level-specific font where needed, make CJK tweaks

Level text such as room names, text box content, and the contents of
the script editor need to be displayed in the level-specific font, and
tweaked to look right. This involves displaying less lines in the
script editor, making text boxes bigger, displaying some text higher
and some text lower. This is still unfinished, but it's the real start
of a migration to font::print functions!

desktop_version/src/Editor.h

@@ -147,6 +147,7 @@ public:
     std::string sbscript;
     int sbx, sby;
     int pagey;
+    int lines_visible;
 
     //Functions for interfacing with the script:
     void addhook(const std::string& t);