ShiftActions

Renders a <div> containing two <button> elements that are stacked vertically with default styles. When showShiftActions is true, these buttons appear at the front of each rule and subgroup:

• Up button: Shifts the rule/group above the preceding rule or into the preceding group as the last member
• Down button: Shifts the rule/group below the next rule or into the next group as the first member

For example, if a subgroup immediately follows a rule, shifting the rule down will move it into that subgroup as the first element, rather than positioning it below the subgroup.