Export of the list of Distinct Assessment Reports: 1, 2, 3, 4, 5
Add 'Acquire' in description message where missing
Move queries related to Assessment Reports together
Export of the list of Distinct Working Groups: 1, 2, 3
Export of the list of Distinct Institutions: Name and (Minimum) Identifier
Export of the list of Distinct Countries: Name and Identifier
Add default item 'Any AR' at the start of Assessment Report list

The default item will always be in first position, and its value
will usually be the empty string ''.
Add explicit keyword 'AS' to name columns for exported lists
Add 'AR' at the start of Assessment Report names

The name of corresponding categories are in the same format.
Add default option first in the list of working groups
Add 'WG' at the start of each Working Group name

The names of corresponding categories are in the same format.
Add comment about the default option for the list of total contributions
Add missing keyword UNION for working group list export
Add default option at the start of each exported list

The value of the default option is '', except for the list
of total contributions, which has the default value '1'.