Show a warning if user browser may not support all the features

[iamandrewluca]

https://github.com/browserslist/browserslist-useragent-regexp

Sometimes in sentry we get error reports from browsers that are very old or not updated.
We should show users a notification if they should update browser or install supported one

[ralienpp]

I think a friendlier approach is to adjust the software such that it works on older systems. With time we'll collect statistics and see whether it is worth it, but there's a general principle - the problem should be solved by the entity that is best equipped to handle it. Thus, showing grandma a "please update your browser" notification will probably lead to more confusion.

I am guessing lots of people use old software because their phones are not updated by their vendors, so they have no choice but to stick to whatever they've got.

Perhaps we should have a lo-fi version of the page that will be shown in these cases?

[iamandrewluca]

At the moment when I receive an error in Sentry, I try to downgrade the final bundle to support that device that fails.