Preferentially split on spaces or hyphens when flowing text

[evilbungle]

No description provided.

[tomsci]

This is an excellent improvement over the previous code, however it does mean the cursor position calculation in keyboard.py's get_cursor_xy() is no longer correct and you can't move the keyboard cursor across a space that was used to break a line, because the sum of the character count of the text from flow_lines doesn't line up with chars_walked and cursor_pos which are indexes into self.text. Because the space char is in self.text but not in the lines from flow_lines. If that makes sense. Suggestions how best to fix that are most welcome :)

[tomsci]

This is an excellent improvement over the previous code, however it does mean the cursor position calculation in keyboard.py's get_cursor_xy() is no longer correct and you can't move the keyboard cursor across a space that was used to break a line, because the sum of the character count of the text from flow_lines doesn't line up with chars_walked and cursor_pos which are indexes into self.text. Because the space char is in self.text but not in the lines from flow_lines. If that makes sense. Suggestions how best to fix that are most welcome :)