Journal members: add a notice for no members.

src/Journals/JournalMembers.tsx

@@ -38,6 +38,7 @@ class JournalMembers extends React.PureComponent<PropsTypeInner> {
         <AppBarOverride title={`${info.displayName} - Members`} />
         <Container style={{maxWidth: 400}}>
           { members ?
+              (members.length > 0 ?
                 <List>
                   { members.map((member) => (
                     <ListItem key={member.user} onClick={undefined}>
@@ -46,6 +47,9 @@ class JournalMembers extends React.PureComponent<PropsTypeInner> {
                   ))}
               </List>
               :
+              <div>No members</div>
+              )
+            :
             <LoadingIndicator />
           }
         </Container>