Function list view

[davidacm]

This PR adds support for the function list view in notepad++ with NVDA. It have some issues that were present before:

• If the scintilla edit window receive the focus manually, the autocomplete feature function won't work. It can be solved if the user go to another window and returns. E.G. press windows key and press it again. Function List view is a good feature of notepad++, that helps to navigate in the code by functions.
• The user can't jump to an element with children. E.G. A class. I don't know if it can be done with the mouse, but with keyboard this feature don't work.

[derekriemer]

This now has conflicts (because I took so long to reply). If I don't get to it before you do, please update.