feat(tooltip) Create and move to our component (#13061)

Create Tooltip component
Fix Popover positioning calculations
Add margins to popover
Remove @atlaskit/tooltip
Update all components to use the new Tooltip component

Added tooltip actions and reducers for the following functionality: when a user hovers over an element is sees the tooltip for that element and then hovers another element that has a tooltip, instead of using the delay and animations we just unmount the current tooltip and mount the next one immediately

react/features/connection-stats/components/ConnectionStatsTable.tsx

@@ -230,12 +230,9 @@ const styles = (theme: Theme) => {
         },
         contextMenu: {
             position: 'relative' as const,
-            marginTop: 0,
+            margin: 0,
             right: 'auto',
-            padding: `${theme.spacing(2)} ${theme.spacing(1)}`,
-            marginLeft: theme.spacing(1),
-            marginRight: theme.spacing(1),
-            marginBottom: theme.spacing(1)
+            padding: `${theme.spacing(2)} ${theme.spacing(1)}`
         },
         download: {},
         mobile: {