Simultaneous Scripts, Slurs, and TupletBrackets turn off collision resolution

Simultaneous Scripts, Slurs, and TupletBrackets turn off collision resolution

When these three grobs occur at the same time, cyclic dependency problems
arise which sometimes cause layout irregularities. This patch turns off
collision resolution in tuplet-bracket.cc for this case, which solves the
layout problem. The cyclic dependency warnings persist, however, for
certain cases.