[MM-48079] Dont show server login when GPO has preconfigured servers (#2346)

* Show onboarding server screen only when teams.length is 0

* Add tests

* Add more tests

* Fix issue where callback would not re-evaluate variables

package.json

@@ -101,7 +101,8 @@
       "__CAN_UPGRADE__": false,
       "__IS_NIGHTLY_BUILD__": false,
       "__IS_MAC_APP_STORE__": false,
-      "__DISABLE_GPU__": false
+      "__DISABLE_GPU__": false,
+      "__SKIP_ONBOARDING_SCREENS__": false
     },
     "setupFiles": [
       "./src/jestSetup.js"