Fix ability for non-owners to change team visibility (#385)

This fixes #384 

* Hides "Change party visibility" button when a user is viewing an
unlisted team they did not create
* Prevents updating team at all if the `editable` flag is not set (which
might break something else for anonymous teams... we'll see)

components/party/Party/index.tsx

@@ -143,7 +143,7 @@ const Party = (props: Props) => {
   // Methods: Updating the party's details
   async function updateDetails(details: DetailsObject) {
     if (!props.team) return await createParty(details)
-    else return await updateParty(details)
+    else if (party.editable) return await updateParty(details)
   }
 
   function formatDetailsObject(details: DetailsObject) {

components/party/PartyHeader/index.tsx

@@ -345,6 +345,7 @@ const PartyHeader = (props: Props) => {
           text={t('party.notices.buttons.copy_link')}
           onClick={copyToClipboard}
         />
+        {party.editable && (
           <Button
             bound={true}
             className="notice no-shrink"
@@ -352,6 +353,7 @@ const PartyHeader = (props: Props) => {
             text={t('party.notices.buttons.change_visibility')}
             onClick={() => handleVisibilityDialogChange(true)}
           />
+        )}
       </div>
     </div>
   )
@@ -362,6 +364,7 @@ const PartyHeader = (props: Props) => {
         <PrivateIcon />
       </div>
       <p>{t('party.notices.private')}</p>
+      {party.editable && (
         <div className={styles.buttons}>
           <Button
             bound={true}
@@ -371,6 +374,7 @@ const PartyHeader = (props: Props) => {
             onClick={() => handleVisibilityDialogChange(true)}
           />
         </div>
+      )}
     </div>
   )