Changed the download functionality to cover IE.

Since IE doesn't work well with `.click()` (because of access denied) we
can take advantage of the `navigator.msSaveOrOpenBlob`.
https://stackoverflow.com/questions/46232980/click-giving-access-denied-in-ie11/46233123#46233123



Signed-off-by: Ken Fukuyama <kenfdev@gmail.com>