[layer-shell] Guideline as to which layer to use for specific uses

Created by: David96

Hey,

I'm currently a bit unsure about which layer should be used for the different programs I'm using. I'm using sway with waybar and bemenu. For waybar, there is a pull request to use the layer shell protocol for proper popup placing. Now I'm in the following situation: bemenu uses top as a layer (hardcoded). To make sure bemenu displays over waybar, I have to set the waybar layer to bottom. But the popups opened by waybar (for example when hovering over an item such as CPU) also open at that layer therefore showing beneath the windows. I could now go ahead and just change the code of bemenu to use overlay as a layer and then set waybars layer to top but first, I wanted to hear whether there's some recommended way of handling this situation.

Thanks in advance and have a nice day :)