Unable to launch symlink'ed application from Desktop

[Norbert]

Steps to reproduce:
1. Have Ubuntu 20.04 LTS installed with Unity desktop
2. Login to the Unity session
3. Open terminal and create symlink to the some application executable with

   ln -s /usr/bin/xclock ~/Desktop/xclock

4. Click on just created `xclock` file symlink on the desktop

Expected results:
* user is able to run symlink'ed application from Desktop

Actual results:
* user is unable to run symlink'ed application from Desktop, the following window is shown instead:

    > Unknown file type
    > There file "xclock" has no known programs associated with it. Use the Open With dialog to pick a program to open it with.

   Click on "Choose a program" and selecting Run Software and then OK does not help.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: nemo 4.4.2-2
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Uname: Linux 5.4.0-28-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: Unity:Unity7:ubuntu
Date: Fri May 8 20:05:31 2020
SourcePackage: nemo
UpgradeStatus: No upgrade log present (probably fresh install)

[Fantu (fantonifabio)]

From a fast test seems that also nautilus (where was forked long time ago) still have same issue