Make creating nondirectional lines easier

Use case or problem

I often make graphs that have no particular orientation. When linking cards, the new line has an arrowhead. When there’s a lot of them, they become distracting and I remove them. I have to do this by hand, which means a lot of clicks.

Proposed solution

Add a setting to set default line direction to either nondirectional, unidirectional or bidirectional.
Or make it so that a new line has the same directionality as the last line edited.

Current workaround (optional)

Creating the line, clicking on it to get contextual menu, clicking on line direction icon, clicking on “Nondirectional”.