<nav> elements for the actions a user can perform on a perticular
page contain inaccessible label whic causes screen reader users
confusion regarding to their current navigation.

TNL-1531

TNL-997

[LMS-11372]
[LMS-11370]

Studio: adding course re-run-centric static template rendering

* initial HTML for dashboard states
* initial HTML for new course re-run view/form
* initial HTML placeholder for outline alert UI

Conflicts:
	cms/templates/index.html

Studio: adding styling for course re-run-centric views

* adding new view/page mast-wizard type
* refactoring create course/element form styling
* adding course re-run view specific styling
* adding courses processing styling (w/ alerts and status)

Course rerun server-side updates: support display_name and DuplicateCourseError.

Studio: further design revisions and tweaks from feedback

* removing new window attribute from re-run control
* removing links from processing courses
* revising look/feel of dismiss action on dashboard + alert
* correcting font-weight of dashboard processing title
* adding extra space to course rerun action on dashboard
* re-wording secondary cancel action on rerun view

Conflicts:
	cms/templates/index.html

Added interation on unsucceeded courses in dashboard

Studio: removing 'rel=external' property from course re-run actions

Studio: removing hover styles for processing courses

Fixed value bug in split and set course listing to display run

moved task.py for rerun