Only add autojoin to a bookmark on creation if the room is not bookmarked

With synchronise_open_rooms, otherwise you just have autojoin added
everytime, which is probably not what you want.

CHANGELOG

@@ -11,6 +11,7 @@ https://dev.louiz.org/projects/poezio/roadmap
 - Contacts won’t be seen playing games or music when they actually stop doing
   so.
 - /leave now toggles off the autojoin flag instead of removing the bookmark.
+- Only add auotjoin on new bookmarks for synchronise_open_rooms on /join
 - /affiliation displays things in the info win instead of directly in the room,
   and additionally displays which room it refers to.
 - List the correct required versions for package maintainers.

poezio/bookmarks.py

@@ -171,7 +171,7 @@ class BookmarkList:
             return self.bookmarks[key]
         return None
 
-    def __in__(self, key) -> bool:
+    def __contains__(self, key) -> bool:
         if isinstance(key, (str, JID)):
             for bookmark in self.bookmarks:
                 if bookmark.jid == key:

poezio/core/commands.py

@@ -401,7 +401,7 @@ class CommandCore:
                 tab.password = password
                 tab.join()
 
-        if config.get('synchronise_open_rooms'):
+        if config.get('synchronise_open_rooms') and room not in self.core.bookmarks:
             method = 'remote' if config.get(
                 'use_remote_bookmarks') else 'local'
             self._add_bookmark('%s/%s' % (room, nick), True, password, method)