[JW Lua] Defaults for multi-measure rest creation

[Jan Angermüller]

Hi Jari,

a nice to have feature for FCMultiMeasureRest would be, filling all 
properties automatically with the values from FCMultiMeasureRestPrefs 
when creating a new FCMultiMeasureRest object. Then creating new 
multi-measure rests would (probably) only require the start and end 
measure and calling the Save() function. Now it's a bit tedious with 
crawling through all the properties from FCMultiMeasureRestPrefs.

I haven't checked how it's done in other classes that have properties 
that also have default values in a prefs-class. But maybe a method like 
"FillWithDefaults()" would be great for these cases if the 
initialization of the properties is not done directly in the class creation.

All the best,
Jan