Seriously, we need BACK the ability to use a slider to size the model cards in My Collection
Either the slider or a way of directly entering the number of cards we want in each row. The advantage of allowing the number of cards to be entered is that there then no need for an upper limit as there would be with a slider.
When the implementation of a control imposes arbitrary limits no matter what you set as as a "sensible" limits someone will almost certainly have a legitimate reason to want to exceed them - for example I can imagine someone with an ultra wide very high resolution monitor wanting to have a couple of dozen cards in each line while someone with poor sight using a vertical monitor may prefer just two cards per line.
As examples from my own experience of being frustrated by arbitrary limits I have at times chosen to print documents with a font size of 5 points, have viewed documents with a single pixel sized characters only to find that some programs won't allow such small sizes, and I have tried to plot 50 signals on a single graph only to be prevented in doing so because the plotting program was limited to 5 at a time. When I run up against such limits I find the normal explanation is "we never thought that people would want to do that" - I have even had that response when the requirements explicity stated that there should be no such limits (which I know was the case with the plotting program because I had written the original spec).