Unexpected document change when selecting item on elementpath

[Garry Yao]

Reproducing Procedures

1. Open the replace by class example page with the following content and selection:

   <table><tr><td>te^xt</td></tr></table>
   

2. Now select the '<tr>' item within the element path bar.
   • Expected Result : Document structure remains.
   • Actual Result : Source codes now as :

      <p>
     	<br />
     </p>
     <table>
     	<tbody>
     		<tr>
     			<td>
     				text</td>
     		</tr>
     	</tbody>
     </table>
     <p>
     	<br />
     </p>
     

[Garry Yao]

This's caued by #3190, but the fixing is not about #3190, it's about the elementpath resolution, the following selection is only possible by using elementpath bar, but we still need to take care of it:

	<table><tbody><tr>^<td>text</td>^</tr></tbody></table>	// Elementpath will tell : blockLimit: body, block: null 

The problem here is that the correct reporting should be : blockLimit: tr, block : null, so the patch is about modifying the pathBlockLimitElements definition.

[Garry Yao]

Fixed with [3565].