Resizeable size of list width and height. Size is not saved yet. In Progress.

Thanks to NLBlackEagle and xet7 !

Related #4558

models/lists.js

@@ -79,6 +79,21 @@ Lists.attachSchema(
       // XXX We should probably provide a default
       optional: true,
     },
+    width: {
+      /**
+       * list width, default 270px
+       */
+      type: String,
+      defaultValue: '270px',
+      optional: true,
+    },
+    height: {
+      /**
+       * list height
+       */
+      type: String,
+      optional: true,
+    },
     updatedAt: {
       /**
        * last update of the list