v0.45.9 release

• fix conflict between CKEditor build content style and externally provided content style (which are not needed when build CSS is available), #1590
• fix include note rendering over floating elements, #1590 
• hide note paths dropdown on changed note, #1572 
• fix/improve behavior of "sorted" attribute
• select attr name in attr detail dialog did not trigger update, closes #1557
• added "safe mode" environment variable switch which disables startup scripts
•  config value to disable backups, closes #1533