fix #47326 Screen readers: Speak characters when editing text

When navigating textual elements (e.g. staff text) with the cursor
keys during editing, the screen reader will announce the name of the
character or word to the right of the caret (text cursor). It also
announces when characters are selected or deselected.

libmscore/score.h

@@ -1188,7 +1188,7 @@ class Score : public QObject, public ScoreElement {
       void setAccessibleInfo(QString s)   { accInfo = s.remove(":").remove(";"); }
       QString accessibleInfo() const      { return accInfo;          }
 
-      void setAccessibleMessage(QString s) { accMessage = s.remove(":").remove(";"); }
+      void setAccessibleMessage(QString s) { accMessage = s; } // retain ':' and ';'
       QString accessibleMessage() const    { return accMessage; }
 
       QImage createThumbnail();