simplified qrcode icon that scales gracefully to 16x16

src/qt/bitcoin.qrc

@@ -38,11 +38,11 @@
         <file alias="lock_open">res/icons/lock_open.png</file>
         <file alias="key">res/icons/key.png</file>
         <file alias="filesave">res/icons/filesave.png</file>
+        <file alias="qrcode">res/icons/qrcode.png</file>
     </qresource>
     <qresource prefix="/images">
         <file alias="about">res/images/about.png</file>
         <file alias="splash">res/images/splash2.jpg</file>
-        <file alias="qrcode">res/images/qrcode.png</file>
     </qresource>
     <qresource prefix="/movies">
         <file alias="update_spinner">res/movies/update_spinner.mng</file>

src/qt/forms/addressbookpage.ui

@@ -86,7 +86,7 @@
        </property>
        <property name="icon">
         <iconset resource="../bitcoin.qrc">
-         <normaloff>:/images/qrcode</normaloff>:/images/qrcode</iconset>
+         <normaloff>:/icons/qrcode</normaloff>:/icons/qrcode</iconset>
        </property>
       </widget>
      </item>