fix: make all the configuration wizards work (#2267)

Correct labels in the context of the wizards, make no wizard terminates
prematurely, make modal windows appear well positioned.

Fixes: WEB-11

src/app/users/create-user/create-user.component.ts

@@ -221,7 +221,7 @@ export class CreateUserComponent implements OnInit, AfterViewInit {
   previousStep() {
     this.configurationWizardService.showUsersForm = false;
     this.configurationWizardService.showUsersList = true;
-    this.router.navigate(['/users']);
+    this.router.navigate(['/appusers']);
   }
 
   /**

src/app/users/users.component.ts

@@ -129,7 +129,7 @@ export class UsersComponent implements OnInit, AfterViewInit {
     this.configurationWizardService.showUsers = false;
     this.configurationWizardService.showUsersList = false;
     this.configurationWizardService.showUsersForm = true;
-    this.router.navigate(['/users/create']);
+    this.router.navigate(['/appusers/create']);
   }
 
   /**