XEXPENSE-22: Change 'Add a new expense report' link to a button
XEXPENSE-22: Change 'Add a new expense report' link to a button

* Added those two classes for fallback on the Colibri skin
Merge pull request #7 from gabrielasmeria/XEXPENSE-22

XEXPENSE-22: Change 'Add a new expense report' link to a button