added help text for aggregation types.
hiding aggregation combo for geometry columns.
Now partitioning the list of data source choices.
Data sources are more consistently named now.
Now partitioning the list of tool choices.
Added "Select all" button
Replaced "Remove all" with "Select all".
Setting showVariableNames no longer resets the internalList if it was
previously set.
Added option to set helpContentHtml.
added alignRight setter.
Hiding "Load my data" by default.
fixed bugs with append and delimiter features.
Data source editors now use registered implementation names as default
data source names.