Bubble [main]

Added new admin notifications; bumped version to 6.11

Wed Oct 25 12:04:12 2023 +0300

Notify about new users, new subspaces, and subspace info updates.

 50_bubble.py |  2 +-
 model.py     | 75 +++++++++++++++++++++++++++++++++++++++++++-----------------
 settings.py  |  5 ++++
 subspace.py  |  6 ++---
 user.py      |  3 +++
 5 files changed, 66 insertions(+), 25 deletions(-)