Document Styling Whole Columns and Rows

Fix #4285. Documentation change only - no changed code. It is not clear to me why using individual set options when styling an entire column works differently than applyFromArray, but the latter produces the expected result and the former doesn't. I will continue to research why. However, in the meantime, we can at least document that applyFromArray is preferred for this operation.

Author: oleibman

docs/topics/recipes.md

@@ -925,6 +925,8 @@ getStyle('A1:M500'), rather than styling the cells individually in a
 loop. This is much faster compared to looping through cells and styling
 them individually.
 
+**Tip** If you are styling entire row(s) or column(s), e.g. getStyle('A:A'), it is recommended to use applyFromArray as described below rather than setting the styles individually as described above.
+
 There is also an alternative manner to set styles. The following code
 sets a cell's style to font bold, alignment right, top border thin and a
 gradient fill: