Fix editing Tags for Cloud Subnets
Fix editing Tags for Cloud Subnets

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1534915

Fix editing Tags for Cloud Subnets when going to Networks -> Networks,
choosing a network, selecting Cloud Subnets and selecting some Subnets
by checking the checkboxes in the list and clicking on Edit Tags under
Policy.

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