Changing only width unit in cell properties dialog does not update table

[f1ames]

Are you reporting a feature request or a bug?

Bug

Check if the issue is already reported

https://dev.ckeditor.com/ticket/12604

Provide detailed reproduction steps (if any)

1. Go to http://sdk.ckeditor.com/samples/fullpreset.html.
2. Set content to some table, e.g.

<table border="1" cellpadding="1" cellspacing="1" style="width:500px">
	<tbody>
		<tr>
			<td style="width:70px">&nbsp;</td>
			<td>&nbsp;</td>
		</tr>
		<tr>
			<td style="width:70px">&nbsp;</td>
			<td>&nbsp;</td>
		</tr>
	</tbody>
</table>

3. Right click in a cell in the first row and choose Cell Properties under Cell option.
4. Change width units from pixels to percent.
5. Click OK.

Expected result

Table cell width unit was changed to percent.

Actual result

Table cell width unit is not updated. It updates only if width value is alos changed.

Other details

• Browser: All (tested on Chrome)
• OS: OS X
• CKEditor version: 4.7.1
• Installed CKEditor plugins: Full preset (tabeltools plugin)