add active hint of call process on outgoing call

add a cycling gif to the outbound call page of callwidget
to show that the process of the call is ongoing and has not
froze.

Change-Id: I0014b0716b095b526bd4a7cb7bf8ea9632a4d156
Reviewed-by: Anthony Léonard <anthony.leonard@savoirfairelinux.com>
diff --git a/callwidget.h b/callwidget.h
index 087fb76..1b63eaa 100644
--- a/callwidget.h
+++ b/callwidget.h
@@ -115,6 +115,7 @@
     QMetaObject::Connection crListSelectionConnection_;
     QPropertyAnimation* pageAnim_;
     QMenu* shareMenu_;
+    QMovie* miniSpinner_;
 
     constexpr static int animDuration_ = 200; //msecs
     constexpr static int qrSize_ = 200;
@@ -132,4 +133,5 @@
     void processContactLineEdit();
     static Account* getSelectedAccount();
     void backToWelcomePage();
+    void hideMiniSpinner();
 };