Hi Kostya—thanks for surfacing this! There is not presently a way to wrap field header text in the manner you're seeking; the only way to see a field's full name is by clicking and expanding the length of the field. Other workarounds involve adding a field description so that you can operate with a succinct title and retain a tool tip to guide users. This is more highly requested feature so I'd recommend adding your vote for this improvement in our Product Ideas section.

Thank you, Mrs. Juliana, for your prompt and specific response.