5b52abc1 copied `<label>` and `<input>` from the `loadedittrackForm` for
consistency, but missed to add some corresponding code to `NoGoAreas.js`.
After completing the implementation, the filename for loading no-go areas is now
displayed after selecting a file just like in the "Load track as route" dialog.
Test Plan:
- Open "Load no-go areas" dialog.
- Browse and select file.
- The filename should now be shown next to "Browse".
- "Load Track as Route" is now triggered by pressing `Shift-O`
- "Load No-Go-Areas" is now triggered by pressing `Shift-N`
- tooltip for navbar link is updated an ready for translation
Cases:
- enabled tooltip gets closed after disable + re-enable
- disabled tooltip gets closed after create + re-hover
Superfluous clearTimeout calls in the regular case after timeout have no
effect.
