This diff streamlines the application view. This includes:

• using the newPage method of the PhabricatorController
• using the application crumb standard class for rendering of crumbs
• using 📊 as application glyph
• using css and flex for sizing of the drawio app iframe (circumvents magic css numbers)
• implementing some phorge coding standards

Creating and editing diagrams (and older versions) look at the new breadcrumbs. Is everything looking and working as expected?