katalog_panelu_admina/themes/default/css/admin-theme.css
druga i trzecia linia dodać:
&subset=latin,latin-ext
Powinno wyglądać tak:
fonts.googleapis.com/css?family=Open+Sans:300,400,700&subset=latin,latin-ext
fonts.googleapis.com/css?family=Ubuntu+Condensed&subset=latin,latin-ext