v0.2.6

Small update for view modes, but mostly for nicer code

• Swap the fft switch for a view mode combox
• Add rfs style scening import
• View mode caching fix
• Fix clip titles being overridden at each new frame rendered
• Fix oob last showed frame
• Fix None title for VideoOutput
• Lots of documentation!
• Normalize ranges when importing from vsedit bookmarks
• Fix global storage not getting loaded when local storage is missing and overriding it with defaults