Move the session management to the overview graph

[F0urchette]

Description

Move the management of sessions to the overview graph, as for the management of milestones.

Hints

• To add a session, click on the graph on the date you want the session to start. The milestone management window appears. Click on the session management tab and you can modify the parameters of the session such as the end and start dates.
• To edit or delete a session, do as for the milestones, click on the session box.