* Add code to allow each editing window it's own undo/redo count.
* Add code to allow for infinite undo/redo when count is set to 0.
* Add edit control to all editing windows general options dialog for
user configuration of undo/redo count.
* Add code to save and restore undo/redo count for each editing window.
File "rules" has instructional text as comments near top.
2) Convert all text files in repo to LF line ending form.
Any checkout done with "rules" in play will convert the working
tree to native line ending, while keeping repo as LF line ending.
* Add hotkey "P" - place item
* Add record and play macros for sequence hotkey.
Macros set to numeric key 0..9.
<Ctrl>+<numkey> - start record macros
<hotkey> <mouse move> ... <hotkey>|<mouse place>
<Ctrl>+<numkey> - end record macros
<numkey> - play macros
* Add menu save/read macros to/from xml-file
* Add configure rotate angle for rotate module: 45 or 90 deg.
* fix segfault when move/drag segment if disconnected to pad