Force reset tooltip size
Try following style to see this bug:
#__attrsInspectorTooltip {
    -moz-appearance: none !important;
    border: 3px solid silver !important;
}
Optimize: getComputedStyle() are mutable, so call it only once
Update Attributes Inspector:
Force reset tooltip size 52d32ccfef909ca4db347b5f15caabd6148c510c
Optimize: getComputedStyle() are mutable, so call it only once fe663c0caf464d01cf3363e2b957b8dca7b07773