Resolve "Confirm notifications with enter key"

Closes #1791 (closed)

Closes #1801 (closed)

came up as a problem here #1797 (comment 354872)

so, the solution was a switch from $q.notify to $q.dialog

also introduces new component MbDialogConfirm

and a refactor of the notifyConfirm mixin to dialogConfirm (i could also revert the refactor bdd9056b to be more backwards compatible)

problems could come up everywhere where the old notifyConfirm function was used