disallow first measure left repeat by default

currently still has some issues e.g. with the default player piece showing a repeat

src/MusicalScore/Graphical/EngravingRules.ts

@@ -679,7 +679,7 @@ export class EngravingRules {
         this.GlissandoDefaultWidth = 0.1;
 
         // Repetitions
-        this.RepetitionAllowFirstMeasureBeginningRepeatBarline = true;
+        this.RepetitionAllowFirstMeasureBeginningRepeatBarline = false;
         this.RepetitionEndingLabelHeight = 2.0;
         this.RepetitionEndingLabelXOffset = 0.5;
         this.RepetitionEndingLabelYOffset = 0.3;