Hotfix for old button markup

- Hotfix for old button markup. .btn.green and .btn.blue is wired to .btn-primary
- Added display:none to .ss-icon

Signed-off-by: Kenneth Dahlstrøm <kenneth@keda.no>
Merge branch 'hotfix/study-program-search-button' into develop

* hotfix/study-program-search-button:
  Hotfix for old button markup