Rain sensor icon not working in floorplan (workaround)

[RedEarth]

I have a rain sensor (Oregon PCR800) that I've added to my floorplan and I've noticed the icon doesn't display correctly. It seems to be looking for "rain48.png" in the www/images folder, which doesn't exist. So as a workaround I just copied Rain48_On.png as rain48.png and it looks good now.

Not sure how long this has been an issue since I only added it to the floorplan after upgrading to 2021.1 (stable). It's not an urgent problem at all, but I thought I'd post this in case others are interested in the workaround.