Editor: rebuild the list of available content files when opening the open/new dialogues
When you have >=1 instance of the OpenMW-CS running, changes in the folders for addons are not recognised. If you d/l an addon for testing you have to close all instances to be able to open that addon. When files are deleted they are still served for opening although they are not existent in the filesystem anymore. "File > "Open" should actualise the data structure that contains available addons and then present the (really) available addons for opening.
OpenMW version 0.36.0 (revision 67f04e0b)
(RM-2644 from redmine: created on 2015-06-09 by Who Knows, , closed on 2015-06-16 by cc 9cii)