Past Elections cosmetics (Joystream#3168)

- rebrand `ended at` to `started at` based on QN results
- fix re-appearance of Joystream#2656 ('round')
- election round tooltip with handbook link

packages/ui/src/app/pages/Election/PastElections/PastElections.tsx

@@ -48,7 +48,7 @@ export const PastElections = () => {
             <>
               <PastElectionsListHeaders $colLayout={PastElectionsColLayout}>
                 <SortHeader {...getSortProps('cycleId')}>Round</SortHeader>
-                <SortHeader {...getSortProps('updatedAt')}>Election ended at</SortHeader>
+                <SortHeader {...getSortProps('updatedAt')}>Election started at</SortHeader>
                 <ListHeader>Total staked</ListHeader>
                 <ListHeader>Revealed votes</ListHeader>
                 <ListHeader>Total candidates</ListHeader>

packages/ui/src/council/components/election/pastElection/PastElectionStats.tsx

@@ -21,11 +21,16 @@ export const PastElectionStats = ({
   totalVotes,
 }: PastElectionStatsProps) => (
   <Statistics>
-    <StatisticItem title="Ended at">
+    <StatisticItem title="Started at">
       {finishedAtBlock ? formatDateString(finishedAtBlock.timestamp) : '-'}
     </StatisticItem>
-    <StatisticItem title="Election round" tooltipText="Lorem ipsum...">
-      <TextHuge bold>{cycleId} round</TextHuge>
+    <StatisticItem
+      title="Election round"
+      tooltipText="Refers to the on-chain election cycle enumeration."
+      tooltipLinkURL="https://joystream.gitbook.io/testnet-workspace/system/council#election"
+      tooltipLinkText="Read about election cycles"
+    >
+      <TextHuge bold>{cycleId}</TextHuge>
     </StatisticItem>
     <NumericValueStat title="Total candidates" value={totalCandidates} />
     <StatsBlock>