* fixed error columns are not saved to database correctly
* implemented setting JRE System Library paths in app settings
* added detector for JRE System Library that not use Java Runtime specified in AppSettings but detects JRE on its own by reusing the JavaPathDetector.
* added option to use JRE System Library in JavaSourceGroup
* added option to create a Coati project from a Maven POM file
* show list of indexed file paths in maven project setup
* use FileManager to detect indexed files in project setup (except cdb)
* added Maven path to preferences window and added path detectors.
* fixed: QtDialogView::hideStatusDialog now also hides loader in status bar.
* refactored ProjectType
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* when Coati is started with no java-path or global cxx header or framework paths in the appsettings they are auto-detected using the first working detector
* order in which the detectors are shown in gui now matches the order they are added to the combined detector.