fix unlock close popup

[danivm]

Fix Metamask popups after unlock

The problem

When Metamask popup still open, some methods can fail.
importWallet and createWallet methods close popups well, but is missing in unlock.

Solution

Create new closeMetamaskPopup method and use it in importWallet, createWallet and unlock.

[drptbl]

@danivm Thanks for contribution! Looks great at first look. I will make sure to test it out today and merge after.

All Best,
Jakub.

[drptbl]

Hey @danivm, it has been merged and released as @synthetixio/[email protected].

Thanks for contribution!

All Best,
Jakub.