Hide placeholder attribute once user populates the first row

Purpose/Overview:
When the Transformation form is opened the first row contains placeholder attribute that should guide the user through the elements of the form. This user story covers the case that the placeholder should be hidden once the user populates field textbox in the first row.

Scenario 1:
Given: the first row of the transformation form with placeholder attribute
When: user starts typing in the field text box
Then: the placeholder attribute from all textboxes in this this row are removed

Scenario 2:
Given: the first row of the transformation form with placeholder attribute
When: user starts typing in the field text box but removes the typed values
Then: the placeholder attribute is displayed again with following values in field, indicators and subfield textboxes: 900 0 0 $a: