fix warnings

src/components/Display.jsx

@@ -25,15 +25,18 @@ export const ValueDisplay = ({prefix, value, suffix, isArrowVisible}) =>{
         setVal(value)
     }
 
-  },[value])
+  },[value, isArrowVisible, oldVal])
 
   let arrow = null
   switch  (arrowState){
     case 1:
       arrow = <CaretUpOutlined style={{color:"red"}}/>
-      break;
+      break
     case -1:
       arrow = <CaretDownOutlined style={{color:"red"}}/>
+      break
+    default:
+      break
   } 
 
   return(<span className='display_value'>{prefix} {val} {suffix}{arrow}</span>)