Issue list alignment tweaks (#15483) (#15766)

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>

templates/shared/issuelist.tmpl

@@ -2,7 +2,7 @@
 	{{ $approvalCounts := .ApprovalCounts}}
 	{{range .Issues}}
 		<li class="item df py-3">
-			<div class="issue-item-left df py-1">
+			<div class="issue-item-left df">
 				{{if $.CanWriteIssuesOrPulls}}
 					<div class="ui checkbox issue-checkbox">
 						<input type="checkbox" data-issue-id={{.ID}}></input>