New Line commands improperly update Undo

[ProgerXP]

When I do undo/redo after/before New Line commands - the cursor must be positioned exactly where it was originally. But it's often shifted by one symbol. This happens at least for New Line Above. I found this while testing #94.

[cshnik]

This is a general Scintilla's problem related to how Undo-history works, actually it never saves/restores cursor position. Please follow next steps using common editor manipulations:

1. Insert next text:

   |1
   2
   3

2. Remove first line (double press on Del):

   |2
   3

3. Press Ctrl+Z to undo the changes and you will get:

   1 |2 3

I've already wrote somewhere that Scintilla has no proper cursor position adjustment when applying undo/redo commands. This is a general problem and will require some time to fix.

[ProgerXP]

I see. Let's postpone this task.