large value in settings fields causes site crash

[Stakelord54]

Bug Description
When entering (large?) amounts of "9"s (might work with any large amount, currently locked out) into the Swap-Setting "deadline", the whole dex implodes for the currently used browser. Reloading / Restarting wont fix it. Switching browsers does fix it, but you can reproduce it there.

Steps to Reproduce

1. Navigate to Swap
2. Click the gear-icon for settings
3. Enter ridiculous deadline (99999999)

Expected Behavior
Some sort of max allowed value