KanbanFlow+ door Iván Barcia

Adds small utilities and interface improvements to KanbanFlow boards.

Current features:
- View notifications by groups: In the notifications sidebar, show buttons to show only tasks related or comments related notifications.

More features will be added soon. You can open an issue in the repository: https://github.com/barcia/kanbanflow-plus

This extension is not related to the KanbanFlow team.