Improved accessibility by providing content description for widgets.
    Disabled extended accessibility tricks on Android versions 4.0 and
    higher where equivalent means are provided by system natively.
Disabled special accessibility tricks for map exploration by touch on
Android 4.0 or higher. Here these capabilities should be implemented
in some other way.
In accessibility mode special actions bound to Click and LongClick
events on the map view.
Automatically restart settings when active plugins list is modified.
Merge pull request #415 from poretsky/proposals

Accessibility improvements
Fixed accessibility settings persistence.
Merge pull request #416 from poretsky/proposals

Fixed accessibility settings persistence.