Crash when rotating newly created list

[0xpr03]

Describe the bug Rotating after creating a new list ends up crashing

To Reproduce Steps to reproduce the behavior:

1. Go to Create a new list
2. Click on Ok in the list name dialog, important step
3. Rotate the app

Additional context Reports

java.lang.RuntimeException: Unable to start activity ComponentInfo{vocabletrainer.heinecke.aron.vocabletrainer/vocabletrainer.heinecke.aron.vocabletrainer.activity.EditorActivity}: java.lang.NullPointerException
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
    at android.app.ActivityThread.handleRelaunchActivityInner(ActivityThread.java:5279)
    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:5187)
    at android.app.servertransaction.ActivityRelaunchItem.execute(ActivityRelaunchItem.java:69)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
    at android.os.Handler.dispatchMessage(Handler.java:107)
    at android.os.Looper.loop(Looper.java:214)
    at android.app.ActivityThread.main(ActivityThread.java:7356)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:491)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.lang.NullPointerException
    at vocabletrainer.heinecke.aron.vocabletrainer.activity.EditorActivity.onCreate(EditorActivity.kt:149)
    at android.app.Activity.performCreate(Activity.java:7824)
    at android.app.Activity.performCreate(Activity.java:7813)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1306)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
    ... 13 more