Handle user denying access to his account

[wissalHaji]

Hi, I'm trying to handle the case where the user denies access to his account when initializing web3, but when I check the web3 status in the state, it's set to failed. I tried to dig in the code and I found out that the action WEB3_USER_DENIED should be dispatched in the catch block of ethereum.enable() instead of WEB3_FAILED.
If you can please make that change.