Columns: Label can be an object like \Nette\Utils\Html [Closed #116]
Tests: Improved
DataSources\DibiFluent: Added missing escaping of column names in sort() function [Closed #117]
Wrong FA icons sizing

Temporary fix repairing FA icons size on Bootstrap btn-xs and btn-sm buttons.
Merge pull request #122 from martinsifra/patch-1

Wrong FA icons sizing
Merge commit '48fb7d24bc02d780b9ccd2ec89d63f7d7d8d11ec' into issue70