use ! to negate instead of - in rearrange helper

Author: mojavelinux

src/helpers/rearrange.js

@@ -7,7 +7,7 @@ module.exports = (collection, property, orderSpec) => {
   const restIdx = order.indexOf('*')
   if (~restIdx) order.splice(restIdx, 1)
   const targetCollection = order.reduce((accum, key) => {
-    if (key.startsWith('-')) {
+    if (key.startsWith('!')) {
       sourceCollection.delete(key.substr(1))
     } else if (sourceCollection.has(key)) {
       accum.push(sourceCollection.get(key))