Added a button to disable skipping. Also changed up popup look.

Resolves https://github.com/ajayyy/SponsorBlock/issues/167

_locales/en/messages.json

@@ -141,9 +141,6 @@
     "removeFromWhitelist": {
          "message": "Remove Channel From Whitelist"
     },
-    "whitelistDescription": {
-         "message": "Whitelist the channels who do sponsorships ethically to encourage good behavior, or maybe if they are just entertaining and funny. Or don't, that's your call."
-    },
     "voteOnTime": {
          "message": "Vote On A Sponsor Time"
     },
@@ -265,5 +262,11 @@
     },
     "0": {
         "message": "Connection Timeout. Check your internet connection. If your internet is working, the server is probably overloaded or down."
+    },
+    "disableSkipping": {
+        "message": "Disable SponsorBlock"
+    },
+    "enableSkipping": {
+        "message": "Enable SponsorBlock"
     }
 }