turn some buttons into <button> elements where possible

BS3 commit ab3e1762d4b20478c83c2eda7a2ff86e8a662020
turn some buttons into <button> elements where possible. forgot a pair of buttons

BS3 commits ab3e1762d4b20478c83c2eda7a2ff86e8a662020,
c0b00f22fe47447155265a20d746889d92918d99