Gutter sync issues

[G33kDude]

The line number gutter fails to stay in sync with the editor when the editor is zoomed, or sometimes when it is scrolled. It also goes out of sync when moving to the end of the document by the Control-End shortcut.

[G33kDude]

This seems to have been mostly fixed with the updated codebase for AHKv2. However, there still seems to be some issues relating to zoom.