musescore/MuseScore — pull request #1084 by Isensee (2014-07-31 16:14:11+00:00)
Title: fix #23543-update_accidentals

This version actually is (once more again) at moment up to date. It replaces #1026.

The feature enables, that changing the accidental of any note is automatically valid for the whole measure from this note on.

Usage: Press the ALT-Key while performing any change of accidenteal (clicking on the symbols within the action bar, or dragging and dropping from the accidental palette, double-clicking there, or pressing the delete key to remove an accidental).