a few fixes and some updates to alerting pages


git-svn-id: http://observium.org/svn/observer/trunk@4399 61d68cd4-352d-0410-923a-c4978735b2b8
don't show entity type from alert table when we know the alert_test_id


git-svn-id: http://observium.org/svn/observer/trunk@4400 61d68cd4-352d-0410-923a-c4978735b2b8
uncomment correct line :)


git-svn-id: http://observium.org/svn/observer/trunk@4401 61d68cd4-352d-0410-923a-c4978735b2b8
replace port/sensor icon in hostbox with sprites. add dashboard sprite. add some comments.


git-svn-id: http://observium.org/svn/observer/trunk@4402 61d68cd4-352d-0410-923a-c4978735b2b8
more comments


git-svn-id: http://observium.org/svn/observer/trunk@4403 61d68cd4-352d-0410-923a-c4978735b2b8