Excitation Editor on Mac: Unable to add additional nodes

[stingjp]

Steps to reproduce

In the excitation editor (i.e. forward dynamics tool) users on Mac seem unable to right click and add additional excitation nodes. The seem to be able to move and edit existing nodes, but nothing else.

Expected result

Right click should pull up options to further edit the excitations:

Actual result

Nothing happens when right clicking.

Environment and GUI version

Seems consistent on 4.4 Gui for Macs. Students in ME485 have had the issue.

[jenhicks]

Will assess in current sprint and if challenging push to next sprint.