Save original layer name when numerate

[okunev]

Hello. Your plugin is very cool. Please, drop a link to PayPal so I can donate.

I have long names which have valuable content. I don't want to loose it when the plugin works. Please, give us a way to save it using some kind of placeholder:

{original-name}

[ScottSavarie]

Hey @okunev this is a great idea. I'm currently pretty busy with other projects, so if you want to submit a PR, I'll be happy to review it, otherwise I can't give an ETA on when I can include this feature. Definitely would like to in the future though :)