The x_label and title seem to disappear in some instances

[rodolakis]

To be investigated. Maybe when the graph gets cleared? (replace)

[rodolakis]

Looks like y_label also goes away at time. Pressing replace brought it back.

[rodolakis]

Found that there was confusion between plot options and dataset option in doPlot (and selectedCheckboxChange):

• plot options: title, xlabel, ylabel
• dataset option: label (for plot legend) The plot options were only passed when at the very begining when making a blank chart (when plot widget did not exist yet) so we were loosing those information in subsequent calls.

Need to pass plot options every time, not just the first time, to update xlabel, ylabel and title.

For title, how to make sure we don't overwritte a custom title (ie not the default date and time)? Same question goes for custom x/y labels and legends. We may need a checkbox/option on the gui to prevent this.