Add error handling for when create dataset XHR request fails.
Style toaster messages for new theme.
Add 'No datasets available' message to menu when not logged in or user has no access to datasets.
Add dijit/_Container mixin to _ModuleViewMixin to allow templated views to use toaster.
Add error message for when current user does not have permission to start import.
Destroy permissions when the owning dataset is destroyed.
Add toaster messages to domNode instead of containerNode.
Use toaster for error message instead of custom node.
Allow posting both JSON and URL encoded form data.
Do not log error for 401 responses.
Refactor registration and login views to use app/util/Form.
Remove unused classes.