im: add a copy button to cm combobox

Change-Id: Id5b023beef399403d92056bc83a21db0df7a3838
Tuleap: #321
diff --git a/callwidget.ui b/callwidget.ui
index 36b706a..26f4e41 100644
--- a/callwidget.ui
+++ b/callwidget.ui
@@ -773,6 +773,35 @@
                     </property>
                    </widget>
                   </item>
+                  <item>
+                   <widget class="QPushButton" name="copyCMButton">
+                    <property name="sizePolicy">
+                     <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+                      <horstretch>0</horstretch>
+                      <verstretch>0</verstretch>
+                     </sizepolicy>
+                    </property>
+                    <property name="minimumSize">
+                     <size>
+                      <width>30</width>
+                      <height>30</height>
+                     </size>
+                    </property>
+                    <property name="maximumSize">
+                     <size>
+                      <width>30</width>
+                      <height>30</height>
+                     </size>
+                    </property>
+                    <property name="text">
+                     <string/>
+                    </property>
+                    <property name="icon">
+                     <iconset resource="ressources.qrc">
+                      <normaloff>:/images/ic_content_copy_white.svg</normaloff>:/images/ic_content_copy_white.svg</iconset>
+                    </property>
+                   </widget>
+                  </item>
                  </layout>
                 </item>
                 <item alignment="Qt::AlignHCenter|Qt::AlignVCenter">