Debug cleanup

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

@@ -686,9 +686,13 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
         }, new Runnable() {
             @Override
             public void run() {
-                if (BuildConfig.DEBUG) {
+                if (BuildConfig.DEBUG)
+                    try {
+                        DnsBlockList.clearCache();
                         ContactInfo.clearCache(ActivityView.this, true);
                         ToastEx.makeText(ActivityView.this, R.string.title_completed, Toast.LENGTH_LONG).show();
+                    } catch (Throwable ex) {
+                        Log.unexpectedError(getSupportFragmentManager(), ex);
                     }
             }
         }));