Sum of cards. In Progress.

Thanks to xet7 !

Related #3796

client/components/lists/listBody.jade

@@ -4,6 +4,17 @@ template(name="listBody")
       if cards.count
         +inlinedForm(autoclose=false position="top")
           +addCardForm(listId=_id position="top")
+      ul.sidebar-list
+        each customFieldsSum
+          li
+            +viewer
+              = name
+            if $eq customFieldsSum.type "number"
+              +viewer
+                = value
+            if $eq customFieldsSum.type "currency"
+              +viewer
+                = formattedCurrencyCustomFieldValue(value)
       each (cardsWithLimit (idOrNull ../../_id))
         a.minicard-wrapper.js-minicard(href=originRelativeUrl
           class="{{#if cardIsSelected}}is-selected{{/if}}"

client/components/lists/listBody.js

@@ -13,6 +13,13 @@ BlazeComponent.extendComponent({
     return [];
   },
 
+  customFieldsSum() {
+    return CustomFields.find({
+      boardIds: { $in: [Session.get('currentBoard')] },
+      showSumAtTopOfList: true,
+    });
+  },
+
   openForm(options) {
     options = options || {};
     options.position = options.position || 'top';