Debugger: clean up 

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44218 4005530d-fff6-0310-9dd1-cebe43e6787f
FPGDBMIDebugger: Use Stack and thread from  watch

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44219 4005530d-fff6-0310-9dd1-cebe43e6787f