Update gnusocial theme commit

src/freedombone-app-gnusocial

 GNUSOCIAL_COMMIT='c67b89e56bf0f90730a9e22beca7e1bd41fc26c3'
 GNUSOCIAL_ADMIN_PASSWORD=
 GNUSOCIAL_THEME_REPO="https://git.gnu.io/h2p/Qvitter.git"
-GNUSOCIAL_THEME_COMMIT='34510bcf37c727f91afad789fb0a531a45171ccf'
+GNUSOCIAL_THEME_COMMIT='510b6c5f9ccd89e3693909198aad691492ace081'
 GNUSOCIAL_WELCOME_MESSAGE=$'<h1>Welcome to GNU Social – a federated social metwork</h1><p>Another Freedombone site</p>'
 GNUSOCIAL_BACKGROUND_IMAGE_URL=
 GNUSOCIAL_MARKDOWN_REPO="https://git.gnu.io/chimo/markdown.git"