components-grid to use correct function setHidable (#8843)

* components-grid to use correct function setHidable

The correct function to use in Vaadin 8 (also before) is setHidable()
https://vaadin.com/api/8.0.0/com/vaadin/ui/Grid.Column.html#setHidable-boolean-
For 7.7.7:
https://vaadin.com/api/7.7.7/com/vaadin/ui/Grid.Column.html#setHidable-boolean-

documentation/components/components-grid.asciidoc

@@ -310,8 +310,8 @@ the [methodname]#removeColumn()#, as described later.
 === Hiding and Removing Columns
 
 Columns can be hidden by calling [methodname]#setHidden()# in [classname]#Column#.
-Furthermore, you can set the columns user hideable using method
-[methodname]#setHideable()#.
+Furthermore, you can set the columns user hidable using method
+[methodname]#setHidable()#.
 
 Columns can be removed with [methodname]#removeColumn()# and
 [methodname]#removeAllColumns()#. To restore a previously removed column,