Whoopsie working is blocking shutdown

[DarkTrick]

Summary
========
In case there is a crashing application as a result of the shutdown command (Menu -> shutdown ), the shutdown process hangs with the message:

`A stop job is running for crash report submission daemon ( [x]s / 1min 30s)`

Steps to reproduce
==================
- Start an application, that will crash on computer-shutdown (I use easystrokes or VIPole).

- Shutdown computer via menu (not command line (might work as well, but untested))

- EXPECTED: computer shuts down quickly; possible crash reports will be sent the next time the computer gets shut down

- or EXPECTED WORKAROUND: The waiting process can be canceled by Ctrl+C

- ACTUAL: The user can only wait. Cancellation (Ctrl+C / Ctrl+\) won't work. Only hardware shutdown can cancel the process.

Note
====
Aside from whoopsie specifically, this waiting period with no cancellation is a general problem, I think. In case several processes prevent the shutdown like whoopsie does, the user has to wait several minutes (about 15min in one extreme case).
A solution for this general problem would be the introduction of a screen to allow users to hard-shutdown any program (like MS Windows does).

lsb_release -rd
===============
Description: Ubuntu 20.10
Release: 20.10

apt-cache policy whoopsie
===========================
whoopsie:
  Installed: 0.2.72.2
  Candidate: 0.2.72.2
  Version table:
 *** 0.2.72.2 500
        500 http://archive.ubuntu.com/ubuntu groovy-updates/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu groovy-security/main amd64 Packages
        100 /var/lib/dpkg/status
     0.2.72 500
        500 http://archive.ubuntu.com/ubuntu groovy/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: whoopsie 0.2.72.2
ProcVersionSignature: Ubuntu 5.8.0-52.59-generic 5.8.18
Uname: Linux 5.8.0-52-generic x86_64
ApportVersion: 2.20.11-0ubuntu50.6
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Sat May 8 16:01:13 2021
RelatedPackageVersions: apport-noui N/A
SourcePackage: whoopsie
UpgradeStatus: No upgrade log present (probably fresh install)

[DarkTrick (darktrick1337)]

I'd like to emphasize, that this bug results in the disability to shutdown and therefore enforces a hardware shutdown in certain situation.

I reported it a little while ago, but it's present for several years.