basis.ui.paginator: fixes
basis.ui.paginator: fixes

- auto-spotlight on page count or span changes
- add missed spanStartPageChanged event emit
- make consistent event emit place

istrel/basisjs,fateevv/basisjs,basisjs/basisjs,smelukov/basisjs,fateevv/basisjs,smelukov/basisjs,tyanas/basisjs,tyanas/basisjs,basisjs/basisjs,istrel/basisjs,basisjs/basisjs,smelukov/basisjs,istrel/basisjs,tyanas/basisjs,fateevv/basisjs