UI: Change OAuth2 templated json icon

application/src/main/data/json/system/oauth2_config_templates/facebook_config.json

@@ -17,7 +17,7 @@
     }
   },
   "comment": null,
-  "loginButtonIcon": "mdi:facebook",
+  "loginButtonIcon": "facebook-logo",
   "loginButtonLabel": "Facebook",
   "helpLink": "https://developers.facebook.com/docs/facebook-login/web#logindialog"
 }

application/src/main/data/json/system/oauth2_config_templates/github_config.json

@@ -14,7 +14,7 @@
     }
   },
   "comment": "In order to log into ThingsBoard you need to have user's email. You may configure and use Custom OAuth2 Mapper to get email information. Please refer to <a href=\"https://docs.github.com/en/rest/reference/users#list-email-addresses-for-the-authenticated-user\">Github Documentation</a>",
-  "loginButtonIcon": "mdi:github",
+  "loginButtonIcon": "github-logo",
   "loginButtonLabel": "Github",
   "helpLink": "https://docs.github.com/en/developers/apps/creating-an-oauth-app"
 }

application/src/main/data/json/system/oauth2_config_templates/google_config.json

@@ -18,7 +18,7 @@
     }
   },
   "comment": null,
-  "loginButtonIcon": "mdi:google",
+  "loginButtonIcon": "google-logo",
   "loginButtonLabel": "Google",
   "helpLink": "https://developers.google.com/adwords/api/docs/guides/authentication"
 }