[PM-2198] Async simple configurable dialogs (#5411)

Implements a new functionality for simple configurable dialogs that allows you to set an acceptAction which triggers a pending state. To use this set acceptAction to an async method, and it will be executed on accept prior to closing the dialog.

libs/angular/src/services/dialog/simple-dialog-options.ts

@@ -48,4 +48,10 @@ export type SimpleDialogOptions = {
 
   /** Whether or not the user can use escape or clicking the backdrop to close the dialog */
   disableClose?: boolean;
+
+  /**
+   * Custom accept action. Runs when the user clicks the accept button and shows a loading spinner until the promise
+   * is resolved.
+   */
+  acceptAction?: () => Promise<void>;
 };