When having a line chart with some data series with gaps, the new feature "Plot
options" can e.g., assume it should be a zero, so that the line is drawn through
the zero point of the axis.

Now when selecting only a single data series and change the setting to "Assume
zero", the result is that all data series with gaps now manage the gaps as zero.
But I wanted just to have this single data series with zeros and not all.

Please add an check box like "Apply for all data series" to the dialog "Data
Series" tab page "Options".