- If the border gets disabled (`config.qtBorder = 0`) it isn't necessary to set the qtClass to `cke_show_border` anymore
	- Event `removeFormatCleanup` is fired if table gets inserted into the editor
- Small changes to the preview table design (no table border, cellspacing and cellpadding of 1)
- Adding option for preview table cell border
- Adding option for preview table cell background on hover
- Adding option for preview table cell size