Comment 4 for bug 1751520

I've pushed two signoff branches:

user/gmcharlt/lp1751520_signoff_master
user/gmcharlt/lp1751520_signoff_3_0

Note that the one for master includes a follow-up accounting for how Webpack needs to pick up context-menu.js. I suspect that the need for explicitly referencing context-menu.js may go away in future releases of angular-tree-control depending on how its maintainer responds to issue reports.