IDE, Debugger: Fix Debugger locking in SourceEdit (protect SynEdit during Paintlock). Calls were unbalanced if method was recursively invoked.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42734 4005530d-fff6-0310-9dd1-cebe43e6787f
Debugger, IDE: After new fix in rev 42734:  REVERT 42669 [[SynEdit in Paintlock => debugger not processmessages]]


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42735 4005530d-fff6-0310-9dd1-cebe43e6787f