IssueTracker

Feedback per API scrub, to be done before alpha if possible:

• Make version with two buttons slots always be auto by default
• Remove AlertDialogButtonStrategy enums, as it will be auto in two slots and in one buttons slot people will be able to make it as they like
• Rename onCloseRequest to onDismissRequest for consistency with other APIs
• clarify in the docs what gets called when back button pressed and when touched outside. Do they both trigger onDismissRequest?
• Expose backgroundColor and contentColor as params.