okular snap: emacsclient does not work

[Daniel Meyer]

1) release: Ubuntu 20.04.1 LTS

2) package: okular snap, 20.04.0, from latest/stable
and okular apt 4:19.12.3-2ubuntu1

3)
okular snap package (for 20.04) does not support emacsclient correctly. In settings -> Editor "Emacs client" was selected. However, shift-click on a pdf did not invoke emacs as expected. The command

emacsclient -a emacs --no-wait +100 file.tex

from a terminal did work. I removed the snap okular package and installed the apt okular package via synaptic. Here emacsclient does work, has the expected behaviour.
A possible reason for the problem is that emacsclient is only invoked when the "Tools -> Browse" is selected. While I did select this in okular-snap, the mouse cursor does not change to "hand", as it does in okular-apt.
Emacs was installed from synaptic, i.e., as apt-package.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: okular 4:19.12.3-2ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.6
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 14 11:10:49 2020
InstallationDate: Installed on 2020-08-04 (9 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: okular
UpgradeStatus: No upgrade log present (probably fresh install)