It would be nice to have a quick search field in this dialog (Project Properties, Files tab) so that I can quickly find files I want to remove from project.
Usually I create a separate projects for Compiler, SDK, RTOS, etc files to help tagging. And I do it by selecting all the "*.h*;*.c*" files from the root of the needed folders. But then I have to remove many "examples", many "boards", many different drivers not applicable to my project. This is why would be nice to have a quick way how find those...
Maybe there is another way to achieve this for example when creating the helper projects, but often I don't know before hand what I want to remove.
Maybe another related way would be to have a "Remove file from project" in context menu, but this might be slower as require opening each unneeded file.