Delete table rows/columns using Shift + Backspace/Delete key Validated

In a Table, add ability to delete selected rows and columns by pressing Shift + Backspace/Delete keys. MS Word has this feature like below,

1. 
   Shift + Delete or

   Shift + Backspace

   key - If a column or multiple columns is selected, then remove the selected columns alone. 

   If a whole table is selected, then remove whole table.
2. Shift + Delete key - If subset cells alone selected from a column or multiple columns, then remove the contents alone (same behavior as Delete key).

   
   
3. Shift + Delete key - If selection is empty (blinking cursor) and regardless of outside or inside table, then do no remove action. If selection is non empty and doesn't selected a cell or multiple cells, then remove like Delete key.
4. Shift + Backspace key - Handle same behavior of 

   Backspace key, regardless of selection empty or not and selection outside or inside table.