Casper Signer | Home screen | Long account names are poorly handled

[karatnyk]

Steps to reproduce:

1. Import account to vault
2. Provide newly imported account with a long name
3. Observe extensions home screen
4. Expand menu
5. Navigate to 'Key management' screen

Expected result: Long account name should be properly handled on each screen where it is visible ('Home' screen, menu dropdown, 'Key management' screen)
Actual result: Long account name is poorly handled