Feature request: Right/Left advance/detract pages like most pdf readers

 * Xreader version 2.6.4
 * Distribution - Fedora fc33.x86_64

This is not a bug report. Feel free to ignore it, as I am sure you are busy.

Issue
Right/left arrow keys do not advance to next/prev page like behavior in most pdf viewers, requiring my most hated activity: reading of directions.

Steps to reproduce

1. Open pdf
2. Want to move to next page
3. Press right arrow key
4. notice nothing's happening
5. look up the docs for xreader
6. notice that it uses ctrl-pgdn/ctrl-pgup instead
7. install evince in avoidance of accessing mental functions

Expected behaviour
Right/Left to advance/detract page

Other information
This is a feature request. I'd love to use x Reader, as I love pretty much everything about Cinnamon, but I cannot abide such blatant disregard of non-explicit, unplanned, defacto standardization.

Cinnamon is greatly appreciated by us mindless creatures of habit because it's basically just like a better version of Windows. I try what I need and it responds how I expect, and that makes me feel warm and fuzzy inside.

Like hot coco on a cold winter morning, chicken soup when you're sick, getting wasted on mixed flavors of alcohol you stole from your parents and puking all over the dance floor the night of your HS prom. Some things should just be like they always have been.

Therefore, I implore you modify xReader to behave more closely to Adobe Reader, otherwise you risk confusing people like me with short attention spans and long muscle memory.

Other than that, keep up the good work!

The payload names no source file or test; start by running Xreader with a PDF and tracing the existing Ctrl-PgUp/Ctrl-PgDn keyboard navigation entry point. Verify completion by confirming Right/Left moves to the next/previous page without breaking the existing shortcuts.