Ensure that current column is visible in generic wxDataViewCtrl.

When navigating between columns using keyboard, ensure visibility of the
newly selected column.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70000 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/datavgen.cpp

@@ -3775,6 +3775,8 @@ bool wxDataViewMainWindow::TryAdvanceCurrentColumn(wxDataViewTreeNode *node, boo
     if ( idx >= (int)GetOwner()->GetColumnCount() )
         return false;
 
+    GetOwner()->EnsureVisible(m_currentRow, idx);
+
     if ( idx < 1 )
     {
         // We are going to the left of the second column. Reset to whole-row