Fix a focus issue in dialog_edit_module_for_BoardEditor.cpp (Linux only) when creating the dialog.

It prevents ESC or ENTER keys to dismiss the dialog, until the focus is set by clicking on a widgets in the dialog.

pcbnew/dialogs/dialog_edit_module_for_BoardEditor.cpp

@@ -393,6 +393,11 @@ void DIALOG_MODULE_BOARD_EDITOR::InitModeditProperties()
     // We have modified the UI, so call Fit() for m_Panel3D
     // to be sure the m_Panel3D sizers are initiliazed before opening the dialog
     m_Panel3D->GetSizer()->Fit( m_Panel3D );
+
+    // For some reason, on Linux, after the call to
+    // m_PreviewPane->SetModelDataIdx( m_LastSelected3DShapeIndex, true )
+    // the dialog has no longer the focus. Force it:
+    m_sdbSizerStdButtonsOK->SetFocus();
 }