Only set sortOrder and sortName to undefined if sortPriority (multi-sort

extension) is used

src/extensions/cookie/bootstrap-table-cookie.js

@@ -511,16 +511,14 @@ $.BootstrapTable = class extends $.BootstrapTable {
       throw new Error('Could not parse the json of the sortPriority cookie!', sortPriorityCookie)
     }
 
-    // sortOrder
-    this.options.sortOrder = undefined
-    // sortName
-    this.options.sortName = undefined
-
     if (!sortPriorityCookie) {
       // sortOrder
       this.options.sortOrder = sortOrderCookie ? sortOrderCookie : this.options.sortOrder
       // sortName
       this.options.sortName = sortOrderNameCookie ? sortOrderNameCookie : this.options.sortName
+    } else {
+      this.options.sortOrder = undefined
+      this.options.sortName = undefined
     }
 
     // sortPriority