Add account id in account settings page

Editor assessment

The subject states a concrete UI addition, the account id is shown on the account settings page, and the 'Fixes: #3317' footer is well-formed token-value grammar linking the change to its request. Chore is a loose type for a UI addition where feat fits better, though the straddle is arguable. No scope, no body explaining who needs the id visible or what problem its absence caused, which is the rationale worth a line. Hygiene otherwise fine. Understandable and well-anchored, thin and loosely typed.