FpDebugger (pure): Use dsInternalPause to trigger setting the breakpoints just after the debuggee has been started. Do not try to evaluate the callstack and the disassembler at this moment.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45283 4005530d-fff6-0310-9dd1-cebe43e6787f