Fix add-server-view communication:vpn-key iron-icon
Fix add-server-view communication:vpn-key iron-icon

This icon wasn’t loaded because of a missing app-root import.

When @polymer/iron-icons was upgraded to version 3 (as part of the
Polymer 3 upgrade) this one icon broke because it’s not part of the
default set.

Jigsaw-Code/outline-client,Jigsaw-Code/outline-client,Jigsaw-Code/outline-client,Jigsaw-Code/outline-client,Jigsaw-Code/outline-client,Jigsaw-Code/outline-client,Jigsaw-Code/outline-client,Jigsaw-Code/outline-client,Jigsaw-Code/outline-client,Jigsaw-Code/outline-client