[ticket/11694] Do not locate assets with root path

Do not locate assets that start with ./

PHPBB3-11694
Merge remote-tracking branch 'cyberalien/ticket/11694' into develop

* cyberalien/ticket/11694:
  [ticket/11694] Do not locate assets with root path
Merge branch 'develop' into ticket/11215

* develop:
  [ticket/11694] Do not locate assets with root path