feat(typeahead): add typeahead-append-to-body option
refactor(buttons): remove some code duplication
fix(modal): Grab reference to body when it is needed in lieu of when the factory is created
revert(typeahead): prevent accidental form submission on ENTER

Closes #1298
This reverts commit 253c49ff26c1bb6c324a0549bc51ee4f45f66429.
fix(modal): focus freshly opened modal

Closes #1187