Changes were made to the HTML h tags - Issue 1451 (#2423) ...

* capture status

* Changes were made to the HTML h tags in order to make it more accessibility friendly and compliant

* Changes to make merge with development possible

* Fixe of the empty class

removed non-relevant modal at phases/edit.html.erb. DMPRoadmap/roadmap#566 ...

Doing some housekeeping for non-relevant modals. DMPRoadmap/roadmap#566

modals according to bootstrap. DMPRoadmap/roadmap#554

modal partial as layout to be re-used across the site. DMPRoadmap/roadmap#554