IDE, Setup: search debugger (gdb) according to path in gdbmidebugger class "ExePath()". Issue 0025997

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44687 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE, Setup: default environment-opts for window, remove info that the IDE should find in setup

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44688 4005530d-fff6-0310-9dd1-cebe43e6787f