CMS-1874 Create SchemaBrowseFilterPanel

Extend reusable class in api: BrowseFilterPanel.

Should have same functionality as the filter panel in the old schema manager.

Implement usage of it in SchemaBrowsePanel.

TODO: There is no facets in server response, need to be implemented in future
Merge pull request #309 from enonic/CMS-1874

CMS-1874 Create SchemaBrowseFilterPanel