Don't crash for problems with grabbing the search suggestions

This crash is not a big problem, it only occurs under rare conditions, but it's better if we can avoid it.

Maybe a toast could be added as well.

It would probably be more correct to rethrow CancellationException exceptions, but not doing it as of now shouldn't be a problem.

You can test the crash, and verify that this commit prevents it, for example by setting a proxy in Aurora, terminating it when you are in the search bar, and then typing something.

I get a crash also by disabling the network and typing in the search bar before Aurora shows the "No network" popup, or by typing after the popup and then re-enabling the network.