Error messages never disappear unless you "X" them

[felipegaucho]

Description:

The red modal basically just stays there, bothering you.

Steps to Reproduce:

1. Make a new account with an empty wallet.
2. Go to a video with a price. Try to play it.
3. Now you get an error because you have no coins. Don't click the "X". Navigate away. The message error stays there.

Actual result:

Check the red box. It never goes away.

Expected result:

It fades out if you navigate to other page, or, if you stay in the same page, it fades out/up after some time?