9.0.0 Support + Quality of life

• Added support for 9.0.0 officially via building for latest libnx
• Now using libnx implementation of web applet
• Launching from an applet never worked and no longer needs to, so now errors and informs you how you can launch from a title
• Updated switch-sys-tweak sysmodule to latest master build (still only used to remove supernag)