Change checklist-item line-height to 18px. Fixes #1619

client/components/cards/checklists.styl

@@ -94,7 +94,7 @@ textarea.js-add-checklist-item, textarea.js-edit-checklist-item
 
 .checklist-item
   margin: 0 0 0 0.1em
-  line-height: 14px
+  line-height: 18px
   font-size: 1.1em
   margin-top: 3px
   display: flex