Button + (Release 0.7.27, Test 0.7.29)

Just curious; I would like to calibrate my Button+ temperature. I’ve got 3 other values in my living room and they are all between 0.4 and 0,6c higher. My idea is to manual correct (advanced settings) my button+ with '+0.5c. But I see that I can only input round numbers.I’ve already found that I can just enter the decimals in another app and copy-paste it in this field. This is working. Maybe an easy change to make input of decimals possible in this field?