Fl_chart: show dotData with x- and y-values instead of y-value only

[lgwds]

Currently, by opting to show dotData only the y-value is shown.

It would be great to be able to show the x-value in the same box. For instance:
x = 28/01
y = 11.0

[imaNNeoFighT]

You must override the LineTouchData then override the touchTooltipData.
I know it is complicated. We will improve its accessibility.

BTW check this sample code, We did something like that.

[lgwds]

Thanks, this works! :)