libs/utils/trace: compute time ranges for plot window
Created by: mdigiorgio
If the user does not want the time to be normalized we need to compute the plot window range boundaries.
Also, the user could specify a window tuple with start and end times. These values are relative to the basetime of the trace and therefore the plot window boundaries are computed accordingly.
Signed-off-by: Michele Di Giorgio michele.digiorgio@arm.com