Debugger: Options, disable add/remove buttons on signal opts. Not implemented

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42931 4005530d-fff6-0310-9dd1-cebe43e6787f
Debugger: Options, mark project as modified, when exceptions are enabled/disabled. Issue 0025074

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42932 4005530d-fff6-0310-9dd1-cebe43e6787f