Debug: prevent cursor window full

app/src/main/java/eu/faircode/email/FragmentLogs.java

@@ -128,7 +128,7 @@ public class FragmentLogs extends FragmentBase {
         super.onActivityCreated(savedInstanceState);
 
         long from = new Date().getTime() - 24 * 3600 * 1000L;
-        int limit = (BuildConfig.DEBUG ? 10000 : 2000);
+        int limit = (BuildConfig.DEBUG ? 5000 : 2000);
 
         DB db = DB.getInstance(getContext());
         db.log().liveLogs(from, limit, null).observe(getViewLifecycleOwner(), new Observer<List<EntityLog>>() {