Add missing import

apps/client/src/app/components/rule/rule-settings-dialog/rule-settings-dialog.component.ts

@@ -1,5 +1,6 @@
 import { XRayRulesSettings } from '@ghostfolio/common/interfaces';
 
+import { CommonModule } from '@angular/common';
 import { Component, Inject } from '@angular/core';
 import { FormsModule } from '@angular/forms';
 import { MatButtonModule } from '@angular/material/button';
@@ -13,7 +14,13 @@ import { MatSliderModule } from '@angular/material/slider';
 import { IRuleSettingsDialogParams } from './interfaces/interfaces';
 
 @Component({
-  imports: [FormsModule, MatButtonModule, MatDialogModule, MatSliderModule],
+  imports: [
+    CommonModule,
+    FormsModule,
+    MatButtonModule,
+    MatDialogModule,
+    MatSliderModule
+  ],
   selector: 'gf-rule-settings-dialog',
   styleUrls: ['./rule-settings-dialog.scss'],
   templateUrl: './rule-settings-dialog.html'