Incomplete blockCalculation feature for selection

[budnix]

Description

The documentation states that the blockCalculation contains only row and column but in fact, this object supports additionally cell and cells properties (https://github.com/handsontable/handsontable/blob/develop/src/selection/mouseEventHandler.js). The problem with this new properties is that they are used interchangeably in the source code and this should be standardized to use only the cell property. The most of plugin what I found uses the cell property.

Your environment

• Handsontable version: 0.38.1
• Browser Name and version: any
• Operating System: any

[AMBudnik]

Still remains the same, for docs version 7.4.2.

The documentation states that the 4th parameter of the beforeOnCellMouseDown callback is an object that shares row, column and cells objects

However, the proper key is cell, so there's a typo

Demo https://jsfiddle.net/trhznf17/1/

Additionally, the 4th parameter is not well explained. Whatever I do they all seem to return false.

This also applies to beforeOnCellMouseOver callback.