Switching between files in Nautilus using keyboard pointers leads to incorrectly chosen file.

## Summary

Switching between files in Nautilus using keyboard pointers leads to incorrectly chosen file.
Unfortunately I was unable to get debug log from the terminal.

## Prerequisites
Ubuntu 18.04 Desktop version is instilled, with GNOME nautilus 3.26.3, nautilus-sendto 3.8.6.

## Steps to reproduce

1) Open nautilus (by clicking on nautilus icon, or by typing "nautilus . &" in a terminal
2) Open a folder with many files that have similar names
(reproduced on:
    * lectures with file names {1..10}-{01..20} "name of the lecture"
    * pictures, with names as follows DSC{00000..11111}.JPG)
3) Select a file in the end of a row and press "->" (right) keyboard pointer, to (presumably) navigate to the next row. (I also noticed, that if the issue is not reproduced easily, zooming in/out in the folder increases the probability of the bug)

## Actual result
If the last file in a row is selected and right pointer button is pressed on the keyboard (sometimes) selection jumps not to the next row, but 2-5 rows ahead.

In the screenshot attached, it jumped from a file named "2-01 Introduction.mp3" to file named "3-08 An Implicit Agreement.mp3"

# Expected result
The selection should jump to the next row, regardless of file names, zoom or other factors.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: nautilus 1:3.26.3-0ubuntu4
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Jun 21 23:20:13 2018
ExecutablePath: /usr/bin/nautilus
GsettingsChanges:
 b'org.gnome.nautilus.preferences' b'search-view' b"'icon-view'"
 b'org.gnome.nautilus.window-state' b'sidebar-width' b'196'
 b'org.gnome.nautilus.window-state' b'geometry' b"'724x610+342+116'"
 b'org.gnome.nautilus.compression' b'default-compression-format' b"'7z'"
InstallationDate: Installed on 2018-05-24 (28 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_nautilus: