Floor Filter should be closed by default in sample

[dfeinzimer]

In the Floor Filter sample, we have the site/facility selector open by default. This is fine on iPad because the map isn't covered by the picker, but on iPhone, the entire screen is covered which can be a bit disconcerting as all of the other samples open up to a visible map.

For example, the basemap gallery and bookmarks and not presented by default when the sample is opened. A user must take action to open those menus.