ui: fix transfer button

- Stylesheet was applying the image from the overlay transfer
button to it because they had the same name

Change-Id: Iaf048a726277963f8b9b9a00b40e14bccaa56cb7
Tuleap: #148
diff --git a/callutilsdialog.ui b/callutilsdialog.ui
index f2cb59a..7b3af4f 100644
--- a/callutilsdialog.ui
+++ b/callutilsdialog.ui
@@ -40,7 +40,7 @@
     </widget>
    </item>
    <item>
-    <widget class="QPushButton" name="transferButton">
+    <widget class="QPushButton" name="doTransferButton">
      <property name="text">
       <string>Transfer</string>
      </property>