Log Message:
Update roundcube to 1.2.5.

RELEASE 1.2.5
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- Fix re-positioning of the fixed header of messages list in Chrome when using
  minimal mode toggle and About dialog (#5711)
- Fix so settings/upload.inc could not be used by plugins (#5694)
- Fix regression in LDAP fuzzy search where it always used prefix search
  instead (#5713)
- Fix bug where namespace prefix could not be truncated on folders list if
  show_real_foldernames=true (#5695)
- Fix bug where base_dn setting was ignored inside group_filters (#5720)