The backend validates that URL inputs are RFC valid URLs (with no
specific length limit), but the frontend appears to have a maximum
length of 50 specified, likely because of a copy-paste error.
Increase the HTML maxlength for this input to 2048, which is a length
supported for URLs by all major browsers.
Fixes#21633
'user-name-section' class is only used to set css for its child
settings-info-icon. This commit removes the 'user-name-section'
class from elements which do not have 'settings-info-icon' as
their child element and also these elements are in not related
to user names.