Comment 0 for bug 1873750

Steps to reproduce:
1. Install Ubuntu MATE 20.04 LTS
2. Install non-default terminal - Tilix, by `sudo apt-get install tilix`
3. Install terminal-based application - Midnight Commander, by `sudo apt-get install mc`
3. Set Tilix as default terminal in `mate-default-applications-properties` or programmatically:

      gsettings set org.mate.applications-terminal exec "'tilix'"

4. Set Tilix as alternative for x-terminal-emulator by update-alternatives:

      update-alternatives --set x-terminal-emulator /usr/bin/tilix.wrapper
      sudo update-alternatives --set x-terminal-emulator /usr/bin/tilix.wrapper

5. Add Custom Application Launcher to the MATE Panel:

      Type: Application in Terminal
      Name: mc
      Command: mc

6. Click the icon of just created Custom Application Launcher

Expected results:

* Midnight Commander is opened in the user-defined terminal - in Tilix

Actual results:

* Midnight Commander is default terminal - in MATE Terminal

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: mate-panel 1.24.0-2
ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
Uname: Linux 5.4.0-24-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Mon Apr 20 10:48:51 2020
InstallationDate: Installed on 2020-04-19 (0 days ago)
InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Beta amd64 (20200419)
SourcePackage: mate-panel
UpgradeStatus: No upgrade log present (probably fresh install)