JBIDE-15751 small string error
JBIDE-13208 - additional changes for mixed areas... rse launch, and new
property for server mode details so it can be used by others

Cleanup

further cleanup, remove printstacktrace, fix some small unclear code, etc

makeRelativeTo not always suitable. Must be careful here

Runtime wizard when opened to edit a runtime fails due to NPE

Addition of test suite and small changes to ensure all tests pass