Hayes: Switch order of older/newer page navigation buttons

In the Hayes theme, customers may opt to enable page navigation at the bottom of the Single Post Page. This is done under Appearance > Customize > Blog Feed Options > Page Feed Navigation. When both the older/newer buttons are enabled, the resulting post page footer will look similar to this:

Some Hayes theme users may wish to reverse the order of these buttons, so that the "older" button is on the left, and the "newer" button is on the right.

Here is what this Code Hack looks like in action:

And here's the code you need to achieve it: