* remove magic 'et' file
* ds1 refactor: test for InsertFloors; fixed inserting bug
* ds1: global method for getting layers group; fixed Delete.. bug (group var in delete meghod wasn't pointer
* ds1: lintfix
* ds1: remove ds1.ds1Layers.Orientation
* ds1: lintfix
* ds1: addet getMaxGroupLen method
* ds1: insert now returns if after inserting group will be greater than max number of ...
* ds1: add common test for ds1Layers.Insert...
Co-authored-by: M. Sz <mszeptuch@protonmail.com>