When all cells are deleted, all table is deleted

[krst]

Connected with test case of #4041

• create table 2x1
• enter some content in both cells
• select content from both cells
• from right-click context menu select Cell- delete cells
• whole table disappears

When cells <td>...</td> tags are deleted in source editing mode, rest of the table stays, in WYSIWYG mode

• on the rest of the table, right click and select properties
• there is delay while opening properties dialog and JS error is thrown in console

  $.rows[...].cells.0.nodeName' is null or not an object (line7) (table.js?t=A8FA)
  

It looks that the scripts waits for value in Columns field, which is empty

Update: I continued this case:

• entered value into Columns field
• Press OK -> another error is shown in console

  'this.$nodeName' is null or not an object (line 16) (ckeditor.js)
  

The table shrinked to a small point (result on second screen)

[garry.yao]

Expired on trunk.