4.0: Localization harmony 🗓

* Added Localization for brazilian portuguese thanks to lipemesquita
* Make replacement by “today” optional (prevent cache plugins issues)
* More standard setting page
* Only show events on dashboard right now if they’re more than 0
* Date and time formats harmonization
* Add `.pot` file and make match text-domain to plugin slug
* Only displays expandable map in the content of the current single
* Rename some js and css files