User script can not be set on Mac os

1. Open WD
2. Create scheme "read sequence"->"write fasta"
3. Choose "show scripting options" on tool bar
4. Choose "user script option" in "write fasta" worker
5. set script text to "url_out = url + ".result.fa"" in dialog
6. click "done button"
Bug state: script parameter is set to no script instead of user script

Ignored GUI-tests:
GUITest_common_scenarios_workflow_scripting::test_0001
GUITest_common_scenarios_workflow_scripting::test_0003
GUITest_common_scenarios_workflow_scripting::test_0004