private void ContextMenuColumnHeader_Opening(object sender, CancelEventArgs e)
{
this.IconSizeNoneToolStripMenuItem.Checked = this._cfgCommon.IconSize == MyCommon.IconSizes.IconNone;
this.IconSize16ToolStripMenuItem.Checked = this._cfgCommon.IconSize == MyCommon.IconSizes.Icon16;
this.IconSize24ToolStripMenuItem.Checked = this._cfgCommon.IconSize == MyCommon.IconSizes.Icon24;
this.IconSize48ToolStripMenuItem.Checked = this._cfgCommon.IconSize == MyCommon.IconSizes.Icon48;
this.IconSize48_2ToolStripMenuItem.Checked = this._cfgCommon.IconSize == MyCommon.IconSizes.Icon48_2;
this.LockListSortOrderToolStripMenuItem.Checked = this._cfgCommon.SortOrderLock;
}