add toggleAdditionalOptions action

#### Changes proposed in this pull request: + Adds an optional boolean prop `closeAdditionalControlsOnClickBody` to disable the default behaviour of closing the additionalControls when clicking anywhere on the body. + Introduces a new window context action `toggleAdditionalControlsOpen` to toggle additional controls. `setAdditionalControlsOpen` action required to explicitly pass a boolean and was hard to use as a toggle because the open/close boolean state is internal to the window and not exposed