fix up styling by reusing existing CSS class names. Also refactor some code regarding the management of static_tabs so that it's in the course as course contains references to static_tabs in the current data model
fix up styling by reusing existing CSS class names. Also refactor some code regarding the management of static_tabs so that it's in the course as course contains references to static_tabs in the current data model

bmedx/modulestore,bmedx/modulestore,bmedx/modulestore