Add the rhythm change n overwrite in song book as pa900

[amitsharma]

I'm facing a big problem with Pa4X song book feature
In book edit 1 resource there is only 1 option"write current" while in pa900 there are 2 options entry and write current.
In pa900 u can change style n overwrite the songbook entry but in Pa4X u can't change style in song book entry. As u change style songbook asking for new entry not any overwrite option.

please do this feature convenient as pa900.
Thanks