annoying: Card catalog screen repositioning when changing total cards

[DaveSkender]

When changing the total cards amount on uswds.facioquo.com/card-catalog, the screen reposition itself, forcing the user to re-locate these controls to perform further adjustments. It's annoying.

I'd attempted to fix this once with an auto-rescroll that repositions the screen in some situations for some browsers, but it's not consistent and has a large, visible repositioning that isn't a nice experience. ref: source code

steps to reproduce

1. scroll to the bottom of the card catalog main section and click "Show 25 more" 3-4 times
2. scroll down to the page controls (shown above) and move the Total cards slider left

this also happens when changing Cards per page in some configurations too

[DaveSkender]

See https://stackoverflow.com/a/6243000/4496145 “return false;” example, maybe it’d help?