fix: display supplier input field when selecting a supplier from the … (#3572)

* fix: display supplier input field when selecting a supplier from the dropdown

* fix: remove supplier dropwdown in target observer

Author: MyvTsv

inc/abstractitiltarget.class.php

@@ -1807,6 +1807,8 @@ protected function showActorSettingsForType($actorType, array $actors) {
             break;
          case CommonITILActor::OBSERVER:
             $type = 'watcher';
+            unset($dropdownItems[PluginFormcreatorTarget_Actor::ACTOR_TYPE_SUPPLIER]);
+            unset($dropdownItems[PluginFormcreatorTarget_Actor::ACTOR_TYPE_QUESTION_SUPPLIER]);
             $changeActorJSFunction = 'plugin_formcreator.changeActor("watcher", this.value)';
             $actorRole = PluginFormcreatorTarget_Actor::ACTOR_ROLE_OBSERVER;
             break;