When all cells are deleted, all table is deleted

[Krzysztof Studnik]

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
The question is whether table with deleted cells should exist or should be deleted also.