Revert "Don't fall back to download if on a desktop"

This reverts commit dfe22f454e9b32bf0b170bd12b500b7d647014ce.
[Fixes #80904730 #82854472]

Due to a customer reported problem with fallback to download on an android device, we are going to delay this fix temporarily.

This bug is due to utils.isMobile() returning incorrectly for certain mobile devices. To solve this we will want to deactivate fallback for known desktop browsers, instead of activating it for known mobile browsers.