styling change on join session button

jam-ui/src/components/sessions/JKSession.js

@@ -188,9 +188,9 @@ function JoinSessionButton({ session }) {
         className="btn-join btn-sm mr-1 mb-1 pt-1 pb-1 pl-1 pr-1"
         style={{ cursor: 'pointer' }}
       >
-        <img src={EnterIcon} alt="enter" className="mr-1" width={20} />
+        <img src={EnterIcon} alt="enter" className="mr-1" style={ { width: "23px" } } />
       </Button>
-      <div>
+      <div className='d-none d-sm-block'>
         <a href="#" onClick={joinSession}>
           Join Session
         </a>