Make it possible to hide certain pipes for clarity

[philipsens]

Today I was looking at some adapters and I saw that the forwards can become a lot when every pipe as an error flow.

Here is an example:

(DetectRolChanges - Zaakbrug Translate)

It would be nice if there could be an ff:hidden="true" attribute, that hides the forwards and let the node appear a bit transparent. Hovering over it, would show all the forwards again.

Then the flow would look a lot clearer:

[stijnpotters1]

@philipsens Now i have a shortcut with H that toggles the hiding. Should i also implement a button in the context menu or just the shortcut?

[stijnpotters1]

@philipsens We can also put the hide in this context menu instead of the node context menu, like in the pr.