Enhancement: settings reorganization & improvements, separate admin section (#4251)

* Separate admin / manage sections

* Move mail settings to its own component

* Move users and groups to its own component

* Move default permissions to its own settings tab

* Unify list styling, add tour step, refactor components

* Only patch saved views that have changed on settings save

* Update messages.xlf

* Remove unused methods in settings.component.ts

* Drop admin section to bottom of sidebar, cleanup outdated, add docs link to dropdown

* Better visually unify management list & other list pages

src-ui/src/app/services/rest/mail-account.service.ts

@@ -50,6 +50,8 @@ export class MailAccountService extends AbstractPaperlessService<PaperlessMailAc
   }
 
   test(o: PaperlessMailAccount) {
-    return this.http.post(this.getResourceUrl() + 'test/', o)
+    const account = Object.assign({}, o)
+    delete account['set_permissions']
+    return this.http.post(this.getResourceUrl() + 'test/', account)
   }
 }