* Add getCollectionIcon function

* Add isRegularCollection function

* Display official badge in collections sidebar

* Don't dim official badge icon in collections sidebar

* Show root collection icon

* Use `CollectionsList.Icon` for "All personal collections"

* Fix CollectionBadge icon color

* Display official collection badge in search results

* Test official badge displayed correctly in sidebar

* Test official badge is shown throughout the app

* Show official badge icon in SavedQuestionPicker

* Use existing isPersonalCollection utility

* Show official badge icon in QuestionPicker

* Show official badge icon in CollectionPicker

* Minor CollectionIcon refactoring

* Use function declaration for isRegularCollection

* Add editCollection test helper

* Add changeCollectionTypeTo helper

* Remove duplicated assertions

* Add helper to create official collection

* Add testOfficialBadgeInSearch helper