feat: QFileDialog QMessageBox QInputDialog QColorDialog and QFontDialog

QFileDialog    文件对话框
QColorDialog   颜色对话框
QFontDialog    字体对话框
QInputDialog   输入对话框
QMessageBox    消息对话框

QtCustomDialogEx/ExCustomMainWin.ui

@@ -100,5 +100,22 @@
  <resources>
   <include location="resources.qrc"/>
  </resources>
- <connections/>
+ <connections>
+  <connection>
+   <sender>actQuit</sender>
+   <signal>triggered()</signal>
+   <receiver>ExCustomMainWin</receiver>
+   <slot>close()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>-1</x>
+     <y>-1</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>407</x>
+     <y>235</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
 </ui>