Straighten connections left to right

[derkork]

Is your feature request related to a problem? Please describe.
Sometimes it would be more convenient to straighten connections from left to right instead of the built-in right-to-left.

Describe the solution you'd like
Ideally pressing Q would continue to work as is (straightening right to left) while Shift+Q would straighten from left to right.

Describe alternatives you've considered
You can emulate this by some clever shifting of nodes and straightening selectively but I'd prefer if this this was just built-in and easy to use rather than forcing the user to be clever about it.