mate-inhibit-applet causes excessive CPU usage

[Mikko Rantalainen]

Please, apply the fix from https://github.com/mate-desktop/mate-power-manager/commit/8e2902337546222db38a00cc16b3d2bc2e0ef852 to mate-power-manager to fix excessive CPU usage after adding "Inhibit Applet" into MATE panel. Due incorrectly implemented icon drawing code in version 1.20 the icon is constantly redrawn which causes 2-6% CPU usage all the time even if the icon visually does nothing.

For more information, see:
https://github.com/mate-desktop/mate-power-manager/issues/248

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: mate-power-manager 1.20.1-2ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-28.30~18.04.1-lowlatency 5.3.13
Uname: Linux 5.3.0-28-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CurrentDesktop: MATE
Date: Sun Feb 9 12:44:13 2020
EcryptfsInUse: Yes
InstallationDate: Installed on 2019-01-05 (399 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: mate-power-manager
UpgradeStatus: No upgrade log present (probably fresh install)