[ZhuchkaTriplesix]

• Expandable tree rows are one node with the row's label, the expanded and selected state and a tap action (before: an unlabelled button that did nothing through a semantics tap).
• QueryaTextField takes a semanticLabel; Host, Port, Username and Password pass their captions.
• The password fields of the SQL and Redis forms drew a second show / hide button over the field's own; the extra one is gone and the built-in one is named "Show password" / "Hide password".
• An environment option is one node (the wrapper and the text inside both carried the label).
• The "Select your database" tiles are buttons with their name and a tap action.

Tests: tree row (label + semantics tap), form fields and the single show button, environment option count. Not run locally; CI decides.

Refs #1822