Reset the filters

Im happy to announce that your filters will persist when you navigate across the page. 

This means that you can filter, click on a spell to read more about it and then return to the spell-index and last list is still active. The list will persist even if you close the browser. 

With some browsers the links for the active filters will disappear. So I added a button called "Reset your filter". Use this to get a full list of spells.