Make it possible to toggle search results layer's visibility

[jacobwod]

Right now the search result layer is always visible and will draw the results features upon search. The default draw order says that it will be placed on top of all other layers.

We have identified user's workflows where this leads to extra steps:

• user activates some layers, perhaps polygons with different colors that indicate different types of a property
• user searches for a place and goes to the result
• the search layer draws another polygon that indicates the result. This polygon hides and/or makes it difficult to see the color of the underlying polygon
• user wants to see what color the polygon underneath the search result has. Since it's impossible to easily hide the search results, user must now clear the search.
• once cleared, user sees the underlying polygon's color
• user can now redo the search to get back the search result marking

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Currently a power user can control the visibility of search results layer if the Active layers functionality is enabled and the user knows about it. A simpler way to fix this would be to add a toggle visibility button somewhere in the search results view:

Opinions?

[jacobwod]

Proposed solution: