Use different wording for "Log out from {custodian name}" when user is in Logged Out state

[Miyayes]

Description

State is called "Logged out", however an option to "Log out from {custodian}" also appears, which could be a little confusing.

Solution

Use "Disconnect from {custodian}" language in this case.

[Miyayes]

Change to "Disconnect from {custodian}"

[stephendonner]

Verified PASSED using

Brave	1.36.47 Chromium: 97.0.4692.71 (Official Build) nightly (x86_64)
Revision	adefa7837d02a07a604c1e6eff0b3a09422ab88d-refs/branch-heads/4692@{#1247}
OS	macOS Version 11.6.1 (Build 20G224)

Steps (for each custodian):

1. new profile
2. launched Brave using --enable-logging=stderr --vmodule="*/variations/*"=6,"*/bat-native-ledger/*"=6,"*/brave_rewards/*"=6,"*/bat-native-ads/*"=6,"*/bat-native-confirmations/*"=6,"*/brave_ads/*"=9,"*/brave_user_model/*"=6 --brave-ads-staging --brave-ads-debug --rewards=staging=true,reconcile-interval=3
3. loaded brave://rewards
4. clicked on Start using Rewards
5. clicked on Verify Wallet
6. entered test credentials
7. returned to brave://rewards / clicked on the BAT icon
8. clicked on the My Wallet dropdown
9. examined the text

bitFlyer, Verified	bitFlyer, logged out	Uphold, Verified	Uphold, logged out	Gemini, Verified	Gemini, logged out