Debug & improve performance of canvas-flow component

[Matthbo]

Need more time to figure out when, what and why when it comes to loading and saving the file and improve upon that.
Looks like some useCallback functions also keep getting called each frame which is making the whole thing so laggy.

Originally posted by @Matthbo in #610 (comment)

[Matthbo]

https://react.dev/learn/you-might-not-need-an-effect