Improve onboarding and UX on project admin

* Overhaul project detail page and add onboarding experience -- replace table with side actions for table with data, add links to user account options during onboarding
* Replace project import/edit form examples with random placeholder text
* Clarify help text on project model some
* Add project dashboard breadcrumb -- will help UX on navigation with menu bar removed
* Spruce up project detail page details -- long fields that always awkwardly wrap now pseudo-textbox, fixed last build field and add build output to last build
* Remove redundant project heading in all project admin pages
This var should have "canonical" in it, because a project_url is something else.