Feature Suggestion: Row – Attribute to change # of Columns

Hi,
This suggestion relates to the Quebly Row Block.
It appears that when you place the block on the page, your initial choice of columns is fixed forever.

It would be nice if it were possible to change this as you can any other attribute.
As this is a feature found in many other plugins eg: Stackable, Atomic & Ultimate Add-ons Blocks, it would help the Quebly row block remain competitive.
Hope this helps.