[ticket/11239] Including username before Overview title

Adding username to the page title to avoid confusion while managing
multiple users in ACP

PHPBB3-11239
[ticket/11239] Removing hard-coded, language specific possessive

PHPBB3-11239
Merge branch 'ticket/11239' of github.com:geetakshi/phpbb into develop

# By geetakshi
# Via geetakshi
* 'ticket/11239' of github.com:geetakshi/phpbb:
  [ticket/11239] Removing hard-coded, language specific possessive
  [ticket/11239] Including username before Overview title