fixed merge issue
fixed indentation and timezone for NTP widget
(cherry picked from commit 80cd3d66821534331f9c922cb2307db8d15c24d3)
Update translation files
Regenerate pot
Fix #7976: Do not add button value to gettext
Welcome 2.4.1-RC
Do not show Serial when it's empty
Added JSON checks for widgets to prevent parsing errors.
Restore auth_check()
Added back the previous commit since it got overwritten.
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