Update frontend strings to Paperless-ngx (#105)

This also includes URLs to ressources.

src-ui/src/environments/environment.ts

@@ -6,7 +6,7 @@ export const environment = {
   production: false,
   apiBaseUrl: "http://localhost:8000/api/",
   apiVersion: "2",
-  appTitle: "Paperless-ng",
+  appTitle: "Paperless-ngx",
   version: "DEVELOPMENT",
   webSocketHost: "localhost:8000",
   webSocketProtocol: "ws:",