ella: downloadFile method not working on safari ios

We are creating an anchor tag and setting its target to `_blank` and we are performing click action via javascript. Safari on ios is assuming it as a popup and is blocking it, it works when `Block Popup` is turned off.
.
Can we add check for Safari to avoid `link.target='_blank`, and then the file will open on same tab. One issue with this solution is that, on ios Safari and Chrome have same userAgents so it will be difficult to differentiate between them.