Even the greatest tools can use some extensions and improvements. These are some of my personal plugins/injections to ImpactJS's editor called Weltmeister.
The latest impactjs from the repo found on your impactjs download page.
If you can't upgrade, for whatever reason, you can check out the DEPRECATED readme but this is NOT recommended!!
Simply get these plugins, place them where you like, and include them through the config file.
plugins: ['weltmeister.plugins.save-extra', 'weltmeister.plugins.floodfill', '...']