Adding scatter plots for time series analysis

**Is your feature request related to a problem? Please describe.**

In order to label a time series it would be useful to have more than just the visualisation of a variable with respect to the time. It would be very helpful to have a 2D scatter plot on which I could select a point (or several) and have access to the date associated.

**Describe the solution you'd like**

The idea would be to allow simple 2D scatter plots. These scatter plots would be complementary to the usual graphs. Ideally the user could select one or several points within the scatter plot and have the corresponding time window associated on the time series graph (the one with respect to the time).

**Describe alternatives you've considered**

Another solution would be to set up a hyper parameter to disable connections between points on the time series graphique. Today if a variable different from time is given in the time series we have this :


If we could juste disable the connection between the point it would be a good start.