ENH: Adding a clear message to indicate how to set the applications input

Code/Common/ApplicationsWrapper/mvdWrapperQtWidgetFileSelection.cxx

@@ -101,6 +101,7 @@ void QtWidgetFileSelection::DoCreateWidget()
 
   m_Input = new QLabel;
   m_Input->setFrameShape(QFrame::Box);
+  m_Input->setText(tr("Drag and drop a dataset here"));
   m_HLayout->addWidget(m_Input);
 
   // Set up input text edit

Code/Common/ApplicationsWrapper/mvdWrapperQtWidgetInputImageParameter.cxx

@@ -100,6 +100,7 @@ void QtWidgetInputImageParameter::DoCreateWidget()
   // Set up input QLabel
   m_Input->setToolTip( m_InputImageParam->GetDescription() );
   m_Input->setFrameShape(QFrame::Box);
+  m_Input->setText(tr("Drag and drop a dataset here"));
 
   // TODO : QLabel does not have signals, remove connections
   connect( this, SIGNAL(textChanged(const QString&)), this, SLOT(SetFileName(const QString&)) );