1. fix the hanging problem for some rare situation (some specific
graphic cards?) by replacing otf file by ttf file.
2. make better font look by adding bold, italic and bold-italic fonts
3. load Source Code Pro privately so it won't be listed for the other
application during Notepad++ session.
Source Code Pro is included in the Notepad++ distribution for its
internal use.
If it's not the first time of Notepad++ installation (ie. updating),
users need to set Source Code Pro as default font manually via style
configurator dialog, or just delete "%APPDATA%\Notepad++\stylers.xml".