Add ability to configure Everything executable working directory (#718)

Plugins/Wox.Plugin.Everything/Settings.cs

@@ -10,6 +10,8 @@ namespace Wox.Plugin.Everything
         public List<ContextMenu> ContextMenus = new List<ContextMenu>();
 
         public int MaxSearchCount { get; set; } = 100;
+
+        public bool UseLocationAsWorkingDir { get; set; } = false;
     }
 
     public class ContextMenu