Behavior difference in removing a link

[liusida]

If the user drag the end of the link from the input slot of the next node out (I usually remove links this way), the behavior is different from the original repo.

Original LiteGraph.js:

Here:

[liusida]

Also, clicking the middle point of a link produces a javascript error:

[Uncaught](lgraphcanvas.js:5621 Uncaught)
ReferenceError: options is not defined

[atlasan]

There is a LiteGraph property controlling the link behavior:
LiteGraph.shift_click_do_break_link_from = false; // [false!] prefer false if too easy to break links - implement with ALT or TODO custom keys
We could move back to default and put false, that's an option each editor could set itself.
Middle click should work on forwardcompatible