Double Lake - Single Geometry Standardization

[adambreznicky]

Establish and document how to handle 'double lakes' which are related and connected physically, sharing a single geometry, but have separate statistics & narratives. One good example provided by @csidenblad was Lake Tyler. The number of lakes this issue pertains to is unknown (Lake Tyler may be the only one) but a conclusion as to how to handle this scenario should be agreed upon.
Once established, @adambreznicky can create a Wiki page on this repo for formal reference.

Using the Lake Tyler example, the initial solution is to:

1. Populate the Story and History for the double lake as a single narrative
2. Ignore the Statistics form (it is not required)
3. Utilize an 'Additional Page' for one lake, and a separate 'Additional Page' for the other with each's individual narrative and statistics as part of its' own page