PLT-3237 Update displayed config values in admin console after saving (#3506)

* Reloaded admin console data when settings are saved

* Fixed attempting to save an invalid config setting overwriting the stored config

webapp/components/admin_console/connection_settings.jsx

@@ -18,11 +18,6 @@ export default class ConnectionSettings extends AdminSettings {
         this.getConfigFromState = this.getConfigFromState.bind(this);
 
         this.renderSettings = this.renderSettings.bind(this);
-
-        this.state = Object.assign(this.state, {
-            allowCorsFrom: props.config.ServiceSettings.AllowCorsFrom,
-            enableInsecureOutgoingConnections: props.config.ServiceSettings.EnableInsecureOutgoingConnections
-        });
     }
 
     getConfigFromState(config) {
@@ -32,6 +27,13 @@ export default class ConnectionSettings extends AdminSettings {
         return config;
     }
 
+    getStateFromConfig(config) {
+        return {
+            allowCorsFrom: config.ServiceSettings.AllowCorsFrom,
+            enableInsecureOutgoingConnections: config.ServiceSettings.EnableInsecureOutgoingConnections
+        };
+    }
+
     renderTitle() {
         return (
             <h3>