Fixing daterange variable header when passed through a FilterHeader
Converting spaces to tabs
Merge branch 'hotfix/range-variable-header' of github.com:groundctrl/php-reports into hotfix/range-variable-header

* 'hotfix/range-variable-header' of github.com:groundctrl/php-reports:
  Fixing daterange variable header when passed through a FilterHeader

Conflicts:
	classes/headers/VariableHeader.php