Add some missing icons into automate simulation results tree
Add some missing icons into automate simulation results tree

Also display just a warning if an icon is missing

https://bugzilla.redhat.com/show_bug.cgi?id=1445089

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic