LHTR: add row above/below.
LHTR: add columns.
LHTR: added function findParent.
LHTR: remove row action.
LHTR: proper row/column insertion with findParent.
LHTR: re-setup JS on window object clearance.
LHTR: remove column action.
LHTR: small refactoring.
LHTR: captions for tables.