Deep redesign: move to SDRangel #5. New icon

sdrbase/mainwindow.ui

@@ -15,7 +15,7 @@
   </property>
   <property name="windowIcon">
    <iconset resource="resources/res.qrc">
-    <normaloff>:/appicon.png</normaloff>:/appicon.png</iconset>
+    <normaloff>:/sdrangel_icon.png</normaloff>:/sdrangel_icon.png</iconset>
   </property>
   <property name="animated">
    <bool>true</bool>

sdrbase/resources/res.qrc

@@ -30,5 +30,6 @@
         <file>pause.png</file>
         <file>stop.png</file>
         <file>sdrangel_logo.png</file>
+        <file>sdrangel_icon.png</file>
     </qresource>
 </RCC>