fixed incorrect invalid avatar check; now should correctly display default avatar

src/Components/MenuList.js

@@ -68,7 +68,7 @@ export default function MenuList(props) {
       >
         <div style={{borderRadius: "50%", border: "2px solid #fff", background: "#fff", overflow: "hidden", maxWidth : "50px", maxHeight : "50px"}}>
             {
-                state.currentUser.avatar === '' || state.currentUser.avatar === null ?
+                state.currentUser.avatar === '' || state.currentUser.avatar === null || state.currentUser.avatar === undefined ?
                 (
 
                     <img src={Profile} alt={'user avatar'} style={{width:"100%", height:"100%", verticalAlign : "middle", marginLeft : "0"}}/>