Add execution time per node

Add a visual execution time for nodes.

As mentioned here Log needed time per node but more simple like the mockup below.

Hi @Mulen

in the topic you link to there is already a reply from Jan talking about the reason not to show it on the canvas.
It also shows you how to view the execution time of a node in the UI for debugging for example.

Of course you are free to add a new feature request, but for it to ever gain traction you will need to give a bit more information on why to add it like this vs the reasoning Jan already gave.
Also do not forget to vote :slight_smile: