Cleanup and use global style on popups (#17674)

* Cleanup and use global style on popups

- Fix typo 'poping' to 'popping'
- Remove most inline 'data-variation' attributes
- Initialize all popups with 'inverted tiny' variation

* misc tweaks

* rename to .tooltip, use jQuery

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/repo/blame.tmpl

@@ -44,7 +44,7 @@
 							</td>
 							<td class="lines-blame-btn">
 								{{if $row.PreviousSha}}
-									<a href="{{$row.PreviousShaURL}}" class="poping up" data-content='{{$.i18n.Tr "repo.blame_prior"}}' data-variation="tiny inverted">
+									<a href="{{$row.PreviousShaURL}}" class="tooltip" data-content='{{$.i18n.Tr "repo.blame_prior"}}'>
 										{{svg "octicon-versions"}}
 									</a>
 								{{end}}