�� Automatic code style fixes

�� Automatic code style fixes

correctly nest items with the same values with different parents

code sniffer fixes

do not sort lists alphabetically

Now nested lists reflect the result set order again. The only exception
being the index level which is always sorted alphabetically. N/A entries
are still always las

do not sort lists alphabetically

Now nested lists reflect the result set order again. The only exception
being the index level which is always sorted alphabetically. N/A entries
are still always last.

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make empty values easier to see in list dump method

lists: correctly handle nesting with empty values

empty values are shown as n/a when they are used in nesting, otherwise
not shown just as before

fixed tests and codesniffer complaints

Add indexing support

Using the index keyword, lists can now have an alphabetical Index at the
top level.

only have unique result rows when nesting

This fixes row duplication on nesting with multiple multival fields

Add nesting option for List Aggregations

This allows to create nested lists based on the selected number of
result columns. This is basically a group-by after the fact and
displaying it in a tree. M

Add nesting option for List Aggregations

This allows to create nested lists based on the selected number of
result columns. This is basically a group-by after the fact and
displaying it in a tree. Multivalues are split up for grouping, so that
a result can be nested by tags for example.

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