Add "Assign Admin" button to the rooms (#156)

* wip on make admin button

* Finish assign admin button

* fixes from pr

* update readme; remove unnecessary console.log; add assign admin to room directory and room view; rename user_id label; set own MXID by default; fix room name display when there is no name

src/components/Footer.tsx

@@ -13,8 +13,6 @@ const Footer = () => {
     }
   }, []);
 
-  console.log(theme);
-
   return (<Box
     component="footer"
     sx={{