feat: Labels reordering

Closes #289

client/src/entry-actions/labels.js

@@ -29,6 +29,14 @@ const handleLabelUpdate = (label) => ({
   },
 });
 
+const moveLabel = (id, index) => ({
+  type: EntryActionTypes.LABEL_MOVE,
+  payload: {
+    id,
+    index,
+  },
+});
+
 const deleteLabel = (id) => ({
   type: EntryActionTypes.LABEL_DELETE,
   payload: {
@@ -106,6 +114,7 @@ export default {
   handleLabelCreate,
   updateLabel,
   handleLabelUpdate,
+  moveLabel,
   deleteLabel,
   handleLabelDelete,
   addLabelToCard,