Add support for setting environment variables in Alt+F2. Such as LC_ALL=C Thunar
## Submitted by loc..@..il.com
Assigned to **Nick Schermer**
**[Link to original bug (#14614)](https://bugzilla.xfce.org/show_bug.cgi?id=14614)**
## Description
Hello, everyone.
Often I need to run a GUI application specifying some env variables, because some apps require them to work correctly.
My particular example being:
LC_ALL=zh_CN.utf8 wine /home/lockywolf/.wine/drive_c/Program\ Files/Tencent/WeChat/WeChat.exe
However, xfce4-apprunner doesn't support such commands.
If someone could help with it, would be great.
Version: 4.13.0
issue