Activity UI > Creation and number of sessions

[hugolpz]

Create a line with [ 7 <>] sessions of [ 15 <>] minutes, or a 2h15 minutes activity.

• this is mainly for clarity purposes
• [ ] https://jsfiddle.net/o95krxz6/53/ -- starting bulma fiddle
• [ ] needs some minor js calculations
• [ ] save back in vue's state the number of sessions ONLY (as for now)
• [ ] D3js PieChart Clock UI : Julien suggested a very visual interface, with an svg dynamic clock on the right displaying the n session with different colors, and the overall time. See interactive pies, code See also #43

NOTE: following step is how to use this all-sessions-duration and single-session-duration values to calculate the sessions (number of) the students have to present.