[BUG] TreeTable adjustColumn() sets wrong width

https://webix.com/snippet/a1f7d9f3

What I expect: all the texts are entirely visible.

What I get:

  1. Firefox 53: “Collection of cheap goods with a cut text” is cut at “x” letter
  2. Chrome 58: similar results
  3. IE 11: the text actually fits inside the cell, but right padding seems too small