Add field to hide approve button

frontend/models/project.ts

@@ -88,6 +88,11 @@ export class ProjectReadItem {
     return new FormatFactory(this.project_type).createUploadFormat()
   }
 
+  get permitApprove(): Boolean {
+    const role = this.current_users_role
+    return role && !role.is_annotator
+  }
+
   toObject(): Object {
     return {
       id: this.id,

frontend/services/application/project.service.ts

@@ -28,6 +28,7 @@ export class ProjectDTO {
   pageLink:                    string
   downloadFormats:             FormatDTO[]
   uploadFormats:               FormatDTO[]
+  permitApprove:               Boolean
 
   constructor(item: ProjectReadItem) {
     this.id = item.id
@@ -42,6 +43,7 @@ export class ProjectDTO {
     this.pageLink = item.annotationPageLink
     this.downloadFormats = item.downloadFormats.map(f => new FormatDTO(f))
     this.uploadFormats = item.uploadFormats.map(f => new FormatDTO(f))
+    this.permitApprove = item.permitApprove
   }
 }