You create your "folders" or rooms in the Apps tab. You can create as many or as few as you wish. Here is a list of my rooms:
The icons turn grey when they are inactive, and yellow when active. Admittedly white on yellow isn't the best, but if that square is lit up, it is active.
I would make a few suggestions that would probably help.
- Divide up your dashboards into rooms or folders as I show above. Expose devices to each room that you want in a room. (don't put every item in every dashboard)
- Go to the gear menu at the top of a particular dashboard, and set to 2 columns wide (see first screenshot) and maybe somewhere about 12-20 rows high. It will look more like the second screenshot below, and you will get vertical scrolling which will be more in line with what most people expect.
- In that gear menu, go to Options tab (see 3rd screenshot) Set the column width to blank, and the height to some fixed value, maybe start with what I have shown below.
- You can change the icon size and font size if that helps, see the first screenshot below again.
Try that, and see if it helps a bit. After that, there are more advanced settings and other options that can be explored.