add socket.io back, cleanup

Change-Id: I74e043268c23fb45371f1e397ca2931ca177afc3
diff --git a/client/src/components/SendMessageForm.js b/client/src/components/SendMessageForm.js
index fb06d49..82ee7af 100644
--- a/client/src/components/SendMessageForm.js
+++ b/client/src/components/SendMessageForm.js
@@ -7,7 +7,8 @@
 
 const useStyles = makeStyles((theme) => ({
   root: {
-    margin: 16,
+    marginLeft: 16,
+    marginRight: 16,
     padding: '2px 4px',
     display: 'flex',
     alignItems: 'center',