UI fixes

src/Squidex/app/features/content/pages/content/content-page.component.html

@@ -66,12 +66,12 @@
             </div>
 
             <div class="modal-body">
-                You have unsaved changes, do you want to close the current content view?`
+                You have unsaved changes, do you want to close the current content view?
             </div>
 
             <div class="modal-footer">
                 <button type="button" class="btn btn-danger" (click)="confirmLeave()">Yes</button>
-                <button type="button" class="btn btn-success" (click)="cancelLeave()">No</button>
+                <button type="button" class="btn btn-secondary" (click)="cancelLeave()">No</button>
             </div>
         </div>
     </div>

src/Squidex/app/framework/angular/can-deactivate.guard.ts

@@ -10,7 +10,7 @@ import { CanDeactivate } from '@angular/router';
 import { Observable } from 'rxjs/Observable';
 
 export interface CanComponentDeactivate {
-    canDeactivate: () => Observable<boolean> | Promise<boolean> | boolean;
+    canDeactivate(): Observable<boolean> | Promise<boolean> | boolean;
 }
 
 @Injectable()