If you start the IDE and then open a project and press F6, nothing happens - you need to select the project first. Since
there can be no ambiguity in this case about which project to run, it should be run. I.e. search order should be
1. Main project, if set.
2. Project associated with selection, if any.
3. [added] Open project, if exactly one.
Integrated into 'main-golden', will be available in build *200811051401* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Milan Kubec <firstname.lastname@example.org>
Log: #141605: iff only one project opened then use it for project specific actions
verified in 20081208
Integrated into 'main-golden', will be available in build *200910281401* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Jesse Glick <email@example.com>
Log: Clarified Javadoc to describe how main project actions actually work now. (#139019, #141605,. #147962)