Feature/consistency etc

[sei-tspencer]

Permission fixes:

• Broaden collection loading to account for Edit/Manage permissions,
  not just ViewCollections
• Fix race condition by moving collection loading to ngOnInit
• Show admin sidebar tabs for users with Edit or Manage permissions
• Gate exhibit create on CreateExhibits system permission
• Separate Edit and Manage permission checks so Manage no longer
  implies Edit for collections and exhibits
• Gate exhibit delete on Manage permission instead of Edit
• Deduplicate card list to fix NG0955 tracking error after sharing

Advance button:

• Add move/inject display and advance button to the wall view
• Wire up advanceExhibit API call via ExhibitDataService
• Show advance button only for users who can manage the exhibit
  and when the exhibit has showAdvanceButton enabled

Article styling:

• Apply theme background to article container
• Prevent theme colors and fonts from bleeding into angular-editor
  and iframe content in article and article-more-dialog components
• Make article page div scrollable, hide scrollbar when printing