Fix project menu item false selected state caused by CSS class name clash

## Summary Project menu item often appears selected when it is not, likely due to a CSS class name clash with other elements sharing the same class. Suggestion: add a prefix to menu class names to avoid conflicts. ## Steps to Reproduce Not provided. ## Expected Behaviour Project menu item should only appear selected when it is actually selected. ## Actual Behaviour Project menu item often appears selected when it is not. ## Environment Not provided. --- *Reported by **retoor** via DevPlace.*