Create independent title string for 'Map' page
Create independent title string for 'Map' page

The "map" page didn't have a separate Transifex string for the page title. Instead the string 'label_map' was being used, which is also used elsewhere on the website. 
To make the page title independent from 'label_map' the title string 'map_title' is added (like on shops page, producers page etc.).
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