[SRU] Update mutter to 3.36.7 in Focal

[Amr Ibrahim]

[Impact]

This is the current GNOME 3.36.x stable update, including some fixes (especially crashes and memory leaks) and translation updates.

https://gitlab.gnome.org/GNOME/mutter/-/blob/gnome-3-36/NEWS

3.36.7
======
* Fix Night Light updates after DPMS [Jonas, Benjamin; #1392]
* Fix IM handling on X11 [Carlos; #1413]
* Fix resizing of attached modal dialogs on wayland [Jonas; !1446]
* Fix jumps when resizing windows using discrete steps [Jonas; #1447]
* Fixed crashes [Marco; !1371, #1345]
* Plugged Memory leaks [Ray; !1449, !1451]
* Misc. bug fixes and cleanups [Jonas, Carlos, Robert; !1218, !1460, !1463]

Contributors:
  Marco Trevisan (Treviño), Benjamin Berg, Carlos Garnacho, Robert Mader, Ray Strode, Jonas Ådahl

Translators:
  Juliano de Souza Camargo [pt]

[Test case]

The update is part of GNOME stable updates.
https://wiki.ubuntu.com/StableReleaseUpdates/GNOME

GNOME Shell and its components should continue working well.

[Regression potential]

There have been fixes in nightlight mode, IM handling in X11 and resizing windows in Wayland. All of those should not regress after the update.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: mutter 3.36.6-1ubuntu0.20.04.2
ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
Uname: Linux 5.4.0-52-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.11
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue Nov 10 19:14:13 2020
InstallationDate: Installed on 2020-04-26 (198 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.