Advanced search block should list/grid view should work without customisation to the theme

[nigelgbanks]

Tricky business to ensure it works without also butting up against customisation in someones theme. At the moment the list / grid toggle changes a css class from view-list to view-grid on the root element of the search view.

The advanced search module does not contain any custom css for this.

So it at the moment it must be added to the theme the user has chosen. This is not ideal, it should work out of the box, but at the same time allow for customisation. Its tricky to get this to play well with custom templates and responsive behaviours given that each site can be wildly different. The base case should only rely on css classes provided by the views module like views-row and not make use of css features that are not widely supported yet.