Fix active effect interactions on items and characters

[Ykabrit]

1. Passive Active Effects failed to create on Characters because of Infinite duration. Now null.
2. No interactions were possible with Active Effects on items (create, edit, delete, toggle). onManageEffect in base-item-sheet.js passed an html item instead of the event to onManageActiveEffect from effects.js, and there was a mismatch on the values of the data-action property in the item-effects.hbs template: create expected instead of createEffect.*

*I didn't change the values in the Handlebars template because it broke the event handling for some reason, so I just added createEffect, editEffect, etc. as also valid values in the onManageActiveEffects handler.