Feature: Selectively hide connections to node

Some nodes, especially checkpointLoader, could get lots of connections, which makes it visually noisy with all these connections.

What I suggest is that if you could select the node, hit [H] on keyboard, and all connections to that node get hidden. Hit H again to un-hide. Or maybe just right-click and select hide connections.

This could help concentrate on the ones that I'm actually trying to be creative with.