Fix #482 with clodo trick : text rendering in PreBarrage schema with Chrome

src/app/components/pb-schema/pb-schema.component.scss

@@ -72,6 +72,10 @@ mat-card-content {
             font-size: 16px;
         }
     }
+    
+    .label foreignObject {
+        overflow: visible;
+    }
 }
 
 #pb-schema-inner-container {