Mark 3.1.1 (#1663)

# 3.1.1 / 2020-09-22

**General**

- Fix notification deliverability when there are multiple tabs open
- Only play notification sounds in the master tab that receives the notification

**Admin Panel**

- Fix issue preventing admins from emailing users through the Admin Panel
- Improve Notification UI
  - Clears notification form after notification submission
  - Add notification to notification list after creation

**Themes**

- Add fix for trying to increment solves when solves are hidden
- Update JS dependencies to fix a transpiliation error preventing optional custom fields from being left empty
  - `@babel/core`, `@babel/preset-env`, `@fortawesome/fontawesome-free`, and `babel-loader` were updated but only `@babel/core` needs to be updated to resolve the transpiliation issue
- Remove `console.log` statements from minified production JS
- Compress notification sound and document the compression command

**Miscellaneous**

- Add the ability to override the sender header of email sent via SMTP with the `MAILSENDER_ADDR` config value

CTFd/__init__.py

@@ -26,7 +26,7 @@ from CTFd.utils.migrations import create_database, migrations, stamp_latest_revi
 from CTFd.utils.sessions import CachingSessionInterface
 from CTFd.utils.updates import update_check
 
-__version__ = "3.1.0"
+__version__ = "3.1.1"
 __channel__ = "oss"