Fix inconsistent checkbox alignment

CHANGELOG

@@ -29,6 +29,7 @@ v 8.12.0 (unreleased)
   - Added 'only_allow_merge_if_build_succeeds' project setting in the API. !5930 (Duck)
   - Reduce number of database queries on builds tab
   - Capitalize mentioned issue timeline notes (ClemMakesApps)
+  - Fix inconsistent checkbox alignment (ClemMakesApps)
   - Use the default branch for displaying the project icon instead of master !5792 (Hannes Rosenögger)
   - Adds response mime type to transaction metric action when it's not HTML
 

app/assets/stylesheets/pages/issues.scss

@@ -12,6 +12,10 @@
       padding-right: 8px;
       margin-bottom: 10px;
       min-width: 15px;
+
+      .selected_issue {
+        vertical-align: text-top;
+      }
     }
 
     .issue-labels {