add 'Add Comment' to the right click menu

[TheOC]

Hello!
I like to annotate my workflows when finished, and it can be a bit of a pain to add more and more comment tools by searching for them, or going through the current right-click menu:

What would be nice is the option to right click anywhere on the canvas, and have the option of 'add comment', similar to how we have the option for 'add container' when selecting tools on the canvas.

Cheers!

[patrick_digan]

Great idea!