Error on chore listing

[GeoffreyFrogeye]

If I open the chores list, the list appears empty, and I get the error: Error: Attempt to invoke virtual method 'java.lang.String java.lang.String.toLowerCase()' on a null object reference. Only the "Sort: Due date" shows a drop-down when clicked.

Clicking the 🔍 button (not necessarily making a search), and the list is now filled, until you exit and reload the view again. The "Sort: Due date" works, the other still don't.

App version: 3.5.2
Server version: 4.2.0 (I'm aware thre wasn't a release explicitely mentionning this release yet, hope this report still helps)

Tested on: My own instance, not a fresh one. Intersting to note is Setting('FEATURE_FLAG_CHORES_ASSIGNMENTS', false);. Removing it doesn't help, although maybe it some chores were created when this flag was on. I could do further testing if requested.

Full stack trace

``` Error: Attempt to invoke virtual method 'java.lang.String java.lang.String.toLowerCase()' on a null object reference

java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.toLowerCase()' on a null object reference
at xyz.zedler.patrick.grocy.util.SortUtil$$ExternalSyntheticLambda29.compare(R8$$SyntheticClass:22)
at java.util.TimSort.countRunAndMakeAscending(TimSort.java:360)
at java.util.TimSort.sort(TimSort.java:220)
at java.util.Arrays.sort(Arrays.java:1351)
at java.util.ArrayList.sort(ArrayList.java:1738)
at java.util.Collections.sort(Collections.java:208)
at xyz.zedler.patrick.grocy.util.ConfigUtil$$ExternalSyntheticLambda2.actionFinished(R8$$SyntheticClass:82)
at xyz.zedler.patrick.grocy.model.User$2$$ExternalSyntheticLambda5.accept(R8$$SyntheticClass:22)
at io.reactivex.rxjava3.internal.operators.single.SingleDoOnSuccess$DoOnSuccess.onSuccess(SingleDoOnSuccess.java:7)
at io.reactivex.rxjava3.internal.operators.single.SingleObserveOn$ObserveOnSingleObserver.run(SingleObserveOn.java:13)
at io.reactivex.rxjava3.android.schedulers.HandlerScheduler$ScheduledRunnable.run(HandlerScheduler.java:3)
at android.os.Handler.handleCallback(Handler.java:959)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loopOnce(Looper.java:232)
at android.os.Looper.loop(Looper.java:317)
at android.app.ActivityThread.main(ActivityThread.java:8501)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:878)

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