Use .qrc file to icons and splashscreen

main_window.ui

@@ -20,8 +20,8 @@
    <string>ARTEMIS3</string>
   </property>
   <property name="windowIcon">
-   <iconset>
-    <normaloff>splash.jpg</normaloff>splash.jpg</iconset>
+   <iconset resource="icon.qrc">
+    <normaloff>:/icons/Artemis3.ico</normaloff>:/icons/Artemis3.ico</iconset>
   </property>
   <property name="styleSheet">
    <string notr="true"/>
@@ -4909,6 +4909,8 @@ QSlider::handle:horizontal {
    <header>double_text_button.h</header>
   </customwidget>
  </customwidgets>
- <resources/>
+ <resources>
+  <include location="icon.qrc"/>
+ </resources>
  <connections/>
 </ui>