[ticket/12377] Move navbar(s) to new template file

PHPBB3-12377
[ticket/12377] Forgot empty line at the end

PHPBB3-12377
[ticket/12377] Moved notifications to new template

And also reset all starting indentation to 0

PHPBB3-12377
[ticket/12377] Renamed template files to navbar_xxx

PHPBB3-12377
[ticket/12377] Forgot to change the INCLUDEs

PHPBB3-12377