tigerhome de

Is there a plugin? Because the only one I've seen linked or when I search says it is not updated for 4.3+
I've been trying to make my own, but not exactly familiar with IPS as opposed to old school traditional website structure.  I've made a custom HTML and CSS for my theme, but not exactly sure where to implement it so the 'Back to Top' appears globally.  Was also playing around with a script that would fade in a 'Back to Top' button when the user scrolls down, but again, not sure how to implement this globally.  An old friend said something about putting it "in the main wrapper" but again, does not know IPS and neither do I, on that level.

Reason for asking is that some PC's don't have "Home" button anymore, and it is really annoying not having that button on the page on this site. Most of the forums I visit have installed a plugin that fixes this and that is great, but why not here and why not as part of the software as default?
The new shortcut I need to remember ob this laptop is: Home = Fn + Left Arrow, End = Fn + Right Arrow
 

Could this be added to make IPS more user friendly on phones?
The scrolling that needs to be done on phone devices is mammoth and there's no easy way up to get back to the top.
Anyone else struggle with this?
The only addon in Marketplace I could find is from 2015 and no longer compatible.