Extended group support

• 4.0.0
  • Removed setting useGroupsAsArrays.
    Instead added field config mode for type !group with values:
    some (default, corresponding useGroupsAsArrays = true),
    array (new, user can choose one of group operators),
    struct (obsolete, corresponding useGroupsAsArrays = false).
  • For type=!group and mode=array:
    • new field configs are available: conjunctions, showNot, operators, defaultOperator, initialEmptyWhere
    • you can use group operators some, none, all or operators with 1 integer opearnd (for count): equal, not_equal, less, between, ..
    • localization setting addSubRuleLabel
  • Removed obsolete setting hideConjForOne