[Firefox] Undoing bold on entire table restores only a part of the selection

[Olek Nowodziński]

1. Use the following HTML in replacebycode:

   <table border="1" cellpadding="1" cellspacing="1" style="width:500px">
   	<tbody>
   		<tr>
   			<td>a</td>
   			<td>b</td>
   		</tr>
   		<tr>
   			<td>c</td>
   			<td>d</td>
   		</tr>
   	</tbody>
   </table>
   

2. Select all table cells with mouse.
3. CTRL+B.
4. CTRL+Z.
5. Note that only the first column remains selected. Expected: The entire table is selected.

I'm unable to reproduce it in different browser. I guess this is mostly because of the fancy way Firefox selects table cells with mouse.

First bad commit: ​git:7f7a7aaa2135

This issue is correlated with #10812.

[Piotrek Koszuliński]

Fixed by #10812.