Origo master feature minor legend

[Polleryd]

#1329

New config values for legend:
visibleLayersControl: boolean - Should visible layers control be active or not.
visibleLayersViewActive: boolean - Sets initial state minor legend.

The above settings, along with the setting "expanded", have also been appended to the share-map functionality.

[tonnyandersson]

Tested and noticed a few things:

• Loading a map with one or more layers visible while using default settings (false) for visibleLayersControl results in a "broken" legend where the visibleLayersControl is active and visible on top of the regular legend.
  

• The legend toolbox is always expanded, even if there are no tools in it. Bug or feature?
  

• Icons should have the same fill color as the rest of the UI (#4a4a4a ).

• New icons should ideally be placed in the section corresponding to the icon's Material Icons category. E.g., the ic_close_fullscreen_24px icon should be placed in the Action section and not in the Image section.
  

• Local changes to index.json should be removed before committing.

[asemoller]

@tonnyandersson You're absolutely right, it doesn't look good something is really messed up when using the default index.json.
Apparently I haven't tested properly, I'm sorry about that 😟!

[tonnyandersson]

LGTM.