Digit nav: Select last entry if digit > num of entries
Entry format: Remove brackets
Code cosmetics
Code cosmetics
Implement proper scrolling

- Add also PageUp/PageDown navigation.
- Do not wrap around when navigating by entry (it is an option, only in
  the code, which is off)
- Highlight the full line for the selected line, not only to the last
  char of the path
- Code cosmetics
- debug(), assert() introduced
Make readme visible in Qt Creator
Readme: Be more precise