refactor(edge-compute): enforce es6 good practices (#3961)

* refactor(edge-groups): use es6 imports

* refactor(edge-jobs): es6 imports

* refactor(edge-stacks): use es6 imports

* refactor(edge-compute): use es6 imports in components

* refactor(edge-compute): use named imports

app/edge/components/edit-edge-stack-form/editEdgeStackFormController.js

@@ -1,6 +1,4 @@
-import angular from 'angular';
-
-class EditEdgeStackFormController {
+export class EditEdgeStackFormController {
   constructor() {
     this.editorUpdate = this.editorUpdate.bind(this);
   }
@@ -9,6 +7,3 @@ class EditEdgeStackFormController {
     this.model.StackFileContent = cm.getValue();
   }
 }
-
-angular.module('portainer.edge').controller('EditEdgeStackFormController', EditEdgeStackFormController);
-export default EditEdgeStackFormController;