Known Places Feature

[psperneac]

• create a KnownPlaces service
• leaflet control opens modal with list of known places, lets you select one, then returns and sends event to container control
• custom-map sends event upstairs to its container
• uses places table, new field 'known'
• acts as a default list of places each user gets
• admin can mark places as 'known'
• would contain a list of well known places in the world as good starting points for a place / marker
• create place / edit place would allow selecting a well known place in a modal to move marker to that place
• main map would allow selecting a well known place and center on that place