By David Morgan and Andrew Chung WASHINGTON (Reuters) -A bipartisan package of modest gun safety measures advanced in the U.S. Senate on Thursday, even as the Supreme Court broadly expanded gun rights by ruling Americans have a constitutional right to carry handguns in public for self-defense. The Senate bill would tighten background checks for would-be gun purchasers convicted of domestic violence or significant crimes as juveniles. It does not include more sweeping gun control measure favored by Democrats including President Joe Biden such as a ban on assault-style rifles or high-capacity ma…