Can't Connect GraphNodes when GraphEdit is zoomed out

[cchipont]

Godot version:

Godot 3.3*

OS/device including version:

Mac OSX / 10.15.7 Catalina

Issue description:

When zoomed out (less than 1:1) I can't seem to be able to connect nodes. Allthough the mouse pointer is placed correctly over the slot, the drag action doesn't produce a connection, but instead moves the whole node.

Steps to reproduce:
In a GraphEdit component, place two nodes, zoom out with the minus button at the top left corner and then try to drag a connection between the said nodes.

[akien-mga]

Duplicate of #46425. This will be fixed by #47173 in 3.4 / 3.3.1.