fix.


git-svn-id: http://observium.org/svn/observer/trunk@4298 61d68cd4-352d-0410-923a-c4978735b2b8
Update icons on page 'about'.


git-svn-id: http://observium.org/svn/observer/trunk@4299 61d68cd4-352d-0410-923a-c4978735b2b8