##### Expected Behavior

* Same behavior as with `sudo --set-home`.
* Editor opening.

##### Current Behavior


```
lxsu exo-open test.txt ; echo $?

0
```
Editor does not open.


##### Steps to Reproduce (for bugs)

1. upgrade Debian stretch to Debian buster (in Qubes OS pr real Debian buster)
2. `sudo apt-get install --no-install-recommends lxqt-sudo`
3. `touch test.txt`
4. `lxsu exo-open test.txt`

##### Context

[desktop shortcut](https://github.com/Whonix/whonix-firewall/blob/master/usr/share/applications/whonix-firewall50user.desktop) using `lxsu` (to get root rights, to have a password prompt), followed [by](https://github.com/Whonix/whonix-firewall/blob/master/usr/lib/whonix-firewall/firewall50user) `xdg-open` (which is supposed to select the user's favorite chosen text editor rather than hardcoding any specific one [or inventing a custom mechanism for choosing one]).

##### System Information

* Distribution & Version: Debian buster (in Qubes)
* Kernel: `Linux version 4.14.74-1.pvops.qubes.x86_64 (user@build-fedora4) (gcc version 6.4.1 20170727 (Red Hat 6.4.1-1) (GCC)) #1 SMP Mon Oct 8 17:14:24 UTC 2018`
* Qt Version: `libqt5designer5:amd64                         5.11.3-4`
* liblxqt Version: 0.14.1
* lxqt-build-tools Version: was build by Debian
* Package version: 0.14.1-1

##### exo-open comparison with non-root and sudo behavior

* `touch test.txt`
* works: `exo-open test.txt`
* works: `sudo --set-home exo-open test.txt`
* fails: `lxsu exo-open test.txt`
 * fails in Qubes Debian buster as well as real Debian buster

##### env comparison with non-root and sudo behavior

Perhaps environment has something to do with it? I guess not. Just in case attaching the different output.

```
sudo --set-home env
COLORTERM=truecolor
XAUTHORITY=/home/user/.Xauthority
LANG=en_US.utf8
LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.jpg=01;35:*.jpeg=01;35:*.mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;36:
TERM=xterm-256color
DISPLAY=:0.0
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
MAIL=/var/mail/root
LOGNAME=root
USER=root
HOME=/root
SHELL=/bin/bash
SUDO_COMMAND=/usr/bin/env
SUDO_USER=user
SUDO_UID=1000
SUDO_GID=1000
```

```
lxsu env

SHELL=/bin/bash
PWD=/home/user
XAUTHORITY=/home/user/.Xauthority
HOME=/root
LANG=en_US.UTF-8
DISPLAY=:0.0
SHLVL=0
PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
MAIL=/var/mail/root
```

##### References
Also reported against lxqt-sudo.

https://github.com/lxqt/lxqt-sudo/issues/114