Right now the buttons can be added only on the left side of the toolbar using `position: ‘TOOLBAR.LEFT_SECTION.FIRST’
it will be useful to be able to add them to the right side too.
@ciocan Thanks - will pass this on and hopefully we can do this soon.
@ciocan Please note this has been added in version 0.15.0, see: Viewer API - MuPDF WebViewer