[tasklist] tasklist/editor/TaskEditorListener

Hi,

I try to change the TL/compiler module so it shows the errors in a new view
but sometimes core/GoToTaskAction does not work.
I suppose it is because TL/compiler module does not depend on TL/editor
and TL/editor/TaskEditorListener is not yet registered as tasklist/compiler
is loaded.

On the other hand TaskEditorListener depends only on openide module. So it
would be
possible to rewrite TL/core/GoToTaskAction so it uses openide directly to
show a line and
remove TL/editor/TaskEditorListener.

Also I found only one class that implements TL/core/TaskViewListener:
TL/editor/TaskEditorListener.
So if the usage of Lookup.lookup(TaskViewListener.class) is not neccessary I
could
delete it too.

Tim