Observed summary data with error bar results have two addresses: one for the
data, and one for the error data. When creating the RimSummaryAddress objects
in the "Data Sources" tree the error data address would occasionally be used
instead of the data address (due to lack of sorting and filtering).
Plots created from the error RimSummaryAddress would display the error data twice
in the "Show Plot Data" view.
Fixed by filtering out the error addresses and improving the sorting criteria.
Fixes#10536.