VM custom button dialog - use the VM instead of the parent service

Triggering a VM-based custom button on a Service's VM Resource causes the right dialog to appear..

But the inital data assumes the associated resource is the service, not the VM.
Subsequent field refresh requests and submit already use the VM, but the initial load was missed in #1022.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1687061

client/app/states/services/custom_button_details/custom_button_details.state.js

@@ -55,6 +55,10 @@ function StateController ($state, $stateParams, CollectionsApi, EventNotificatio
       target_id: vm.serviceId,
       target_type: 'service'
     }
+    if (vm.vmId) {
+      options.target_type = 'vm'
+      options.target_id = vm.vmId
+    }
 
     const dialogId = vm.resourceAction.dialog_id
     const resolveDialogs = CollectionsApi.query(`service_dialogs/${dialogId}`, options)