Merge branch 'pms-fix-tooltip-padding' into 'master'

Fix tooltip padding to align to 8px grid

See merge request gitlab-org/gitlab-ce!14928

app/assets/stylesheets/framework/tooltips.scss

@@ -3,5 +3,5 @@
   border-radius: $border-radius-default;
   line-height: 16px;
   font-weight: $gl-font-weight-normal;
-  padding: $gl-btn-padding;
+  padding: 8px;
 }