fix: disable modal confirm while wheel spinning (#824)

* fix: disable confirm while scrolling

Regression, introduced in 5.0.2 by #804

* cleanup

android/src/main/java/com/henninghall/date_picker/DatePickerModuleImpl.java

@@ -13,6 +13,8 @@
 import com.facebook.react.bridge.Dynamic;
 import com.facebook.react.bridge.ReadableMap;
 import com.facebook.react.bridge.ReadableMapKeySetIterator;
+import com.henninghall.date_picker.ui.SpinnerState;
+import com.henninghall.date_picker.ui.SpinnerStateListener;
 
 import net.time4j.android.ApplicationStarter;
 
@@ -126,9 +128,21 @@ private PickerView createPicker(ReadableMap props){
             }
         }
         picker.update();
+
+        picker.addSpinnerStateListener(new SpinnerStateListener() {
+            @Override
+            public void onChange(SpinnerState state) {
+                setEnabledConfirmButton(state == SpinnerState.idle);
+            }
+        });
+
         return picker;
     }
 
+    private void setEnabledConfirmButton(boolean enabled) {
+        dialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(enabled);
+    }
+
     private View withTopMargin(PickerView view) {
         LinearLayout linearLayout = new LinearLayout(DatePickerPackage.context);
         linearLayout.setLayoutParams(new LinearLayout.LayoutParams(