some icon fixes

Signed-off-by: Joerg Steffens <joerg.steffens@bareos.com>
[Feature] New Timeline

- Simile Timeline implemented
- Fixed typo in ErrorController.php
Merge pull request #10 from fbergkemper/simile-timeline

[Feature] New Timeline
Merge branch 'bareos-master' of https://github.com/bareos/contrib-webacula into bareos-master