Only show Switch menu items when more than 1 account

src/pages/accounts.jsx

@@ -110,6 +110,8 @@ function Accounts({ onClose }) {
                         </button>
                       }
                     >
+                      {moreThanOneAccount && (
+                        <>
                           <MenuItem
                             disabled={isCurrent}
                             onClick={() => {
@@ -132,6 +134,8 @@ function Accounts({ onClose }) {
                             </MenuLink>
                           )}
                           <MenuDivider />
+                        </>
+                      )}
                       <MenuItem
                         onClick={() => {
                           states.showAccount = `${account.info.username}@${account.instanceURL}`;