Fix dayjs fromNow bug (it requires plugin, so use our util instead)

web/components/relative-timestamp.tsx

@@ -1,16 +1,15 @@
 import { DateTimeTooltip } from './datetime-tooltip'
-import dayjs from 'dayjs'
 import React from 'react'
+import { fromNow } from 'web/lib/util/time'
 
 export function RelativeTimestamp(props: { time: number }) {
   const { time } = props
-  const dayJsTime = dayjs(time)
   return (
     <DateTimeTooltip
       className="ml-1 whitespace-nowrap text-gray-400"
       time={time}
     >
-      {dayJsTime.fromNow()}
+      {fromNow(time)}
     </DateTimeTooltip>
   )
 }