Tuplets need a "Set bracket horizontal" checkbox in the Inspector

1. Use or create a score with many tuplets, where the tuplets start or end with a rest (example score attached).
2. By the rules of Elaine Gould's "Behind Bars", tuplets with a rest must use a bracket as well as the number.
3. Use Format > Style... > Tuplets > Maximum slope, to set max slope to zero.
   Expected result: all tuplet brackets should be exactly horizontal
   Actual result: tuplet brackets vary from the horizontal enough to be visually irritating

Suggestion:
a) Expose the Maximum Slope property in the Inspector
b) Add a checkbox for "Set bracket horizontal" to force the issue on multi-selected tuplets

Without a new multi-select option in the Inspector, attempting to make all the tuplet brackets exactly horizontal is a painstaking and very time-consuming task. And the task is even worse if the score was created in MS2 and is then edited in MS3.