fix: icon & copy for adding new wallets

[reneaaron]

Describe the changes you have made in this PR

Some users seem not to be aware of the multi-account capabilities.

• Replaces circled plus icon with just the plus icon for for better recognizability
• Replaced "Connect a Wallet" with just "Add"

[jpl-btc]

Just a reminder for why doing this:

• we have seen people on social media asking how to make more than account
• we received jotforms of people uninstalling because they thought they could not have more than one profile
• I had to send emails explaining how to manage multiple extension accounts due to users not understanding how to do it by themselves by exploring the extension interface

[bumi]

+1 what do we do with the translations?

[reneaaron]

I removed existing translations and fixed a test.

[pavanjoshi914]

tACk. thanks for updating other translation files as well!