Fix #365 - disable snwackbars during session emptying

src/app/app.component.ts

@@ -623,6 +623,10 @@ export class AppComponent implements OnInit, OnDestroy, Observer {
   }
 
   public doEmptySession() {
+    // temporarily disable snackbars
+    const oldNotifState = this.appSetupService.enableNotifications;
+    this.appSetupService.enableNotifications = false;
+    // close all calculators
     for (const c of this._calculators) {
       const form = this.formulaireService.getFormulaireFromId(c.uid);
       this.formulaireService.requestCloseForm(form.uid);
@@ -630,6 +634,8 @@ export class AppComponent implements OnInit, OnDestroy, Observer {
     // just to be sure, get rid of any Nub possibly stuck in session without any form attached
     Session.getInstance().clear();
     Session.getInstance().documentation = "";
+    // restore snackbars
+    this.appSetupService.enableNotifications = oldNotifState;
   }
 
   public loadSession() {