Revert "Add 'Match type' to list of filter properties to validate"

This reverts commit 5e12bf9819d923e00020e11083426355f7a3d5f0 which
caused a regression (system notice when displaying the match type filter
criteria, or application error 203 when trying to apply the filter).

The change made match_type a multivalue property, which caused it to be
converted to an array by filter_ensure_valid_filter().

Issue 0020105