Regex for search/replace option of output in Rainbow

[Former user]

Original [issue 141](https://code.google.com/p/okapi/issues/detail?id=141) created by @ysavourel on 2010-07-09T15:43:39.000Z:

There is a search/replace option in the settings for the output filenames in Rainbow. It would be very nice to have the possibility to use regulat expressiosn there.

[Former user]

Comment [1.](https://code.google.com/p/okapi/issues/detail?id=141#c1) originally posted by @ysavourel on 2010-07-19T14:01:40.000Z:

[Former user]

Comment [2.](https://code.google.com/p/okapi/issues/detail?id=141#c2) originally posted by @ysavourel on 2011-08-04T13:42:37.000Z:

[Jim Hargrave (OLD)]

low priority