Improved gid lists performance. Fixed GUI small issues.

visimpl/MainWindow.cpp

@@ -774,7 +774,7 @@ namespace visimpl
     QGroupBox* selFunctionGB = new QGroupBox( "Current selection");
     QHBoxLayout* selLayout = new QHBoxLayout( );
     selLayout->setAlignment( Qt::AlignTop );
-    selLayout->addWidget( new QLabel( "Selection size: " ));
+    selLayout->addWidget( new QLabel( "Size: " ));
     selLayout->addWidget( _selectionSizeLabel );
     selLayout->addWidget( buttonSelectionManager );
     selLayout->addWidget( _addGroupButton );

visimpl/SelectionManagerWidget.cpp

@@ -88,8 +88,11 @@ namespace visimpl
 
     _listViewAvailable = new QListView( );
     _listViewAvailable->setSelectionMode( QAbstractItemView::ExtendedSelection );
+    _listViewAvailable->setUniformItemSizes( true );
+
     _listViewSelected = new QListView( );
     _listViewSelected->setSelectionMode( QAbstractItemView::ExtendedSelection );
+    _listViewSelected->setUniformItemSizes( true );
 
     _modelAvailable = new QStandardItemModel( );
     _modelSelected = new QStandardItemModel( );
@@ -406,7 +409,8 @@ namespace visimpl
          tr( "Text  files (.txt);;All files (*)" ),
          nullptr, QFileDialog::DontUseNativeDialog );
 
-    _lineEditFilePath->setText( path );
+    if( !path.isEmpty( ))
+      _lineEditFilePath->setText( path );
   }
 
   void SelectionManagerWidget::_buttonSaveClicked( void )