plasma-desktop: update to 5.20.0

[ci skip]

srcpkgs/plasma-desktop/patches/no-discover-recommendation.patch

@@ -0,0 +1,15 @@
+We don't ship Discover and the taskmanager doesn't check if the defaults even
+exist and having a not working link by default in the taskbar is well, useless.
+
+---
+--- applets/taskmanager/package/contents/config/main.xml	2020-09-17 13:26:23.000000000 +0200
++++ -	2020-09-18 17:24:15.772878765 +0200
+@@ -77,7 +77,7 @@
+     </entry>
+     <entry name="launchers" type="StringList">
+       <label>The list of launcher tasks on the widget. Usually .desktop file or executable URLs. Special URLs such as preferred://browser that expand to default applications are supported.</label>
+-      <default>applications:systemsettings.desktop,applications:org.kde.discover.desktop,preferred://filemanager,preferred://browser</default>
++      <default>applications:systemsettings.desktop,preferred://filemanager,preferred://browser</default>
+     </entry>
+     <entry name="middleClickAction" type="Enum">
+       <label>What to do on middle-mouse click on a task button.</label>

srcpkgs/plasma-desktop/template

@@ -1,6 +1,6 @@
 # Template file for 'plasma-desktop'
 pkgname=plasma-desktop
-version=5.19.5
+version=5.20.0
 revision=1
 build_style=cmake
 configure_args="-DBUILD_TESTING=OFF"
@@ -15,7 +15,8 @@ maintainer="John <me@johnnynator.dev>"
 license="GPL-2.0-or-later, LGPL-2.0-or-later, LGPL-2.1-or-later, GFDL-1.2"
 homepage="https://invent.kde.org/plasma/plasma-desktop"
 distfiles="${KDE_SITE}/plasma/${version}/${pkgname}-${version}.tar.xz"
-checksum=c63e1c81edc438656f9159e235be31e3b1b11a3f8ecbe5b97b21fcc91eb71a70
+checksum=4bf5aa68ac132fa651a2694af772342ece61da2a3a2c1d7c6da75c84bec6b87f
+replaces="user-manager>=0"
 
 if [ "$CROSS_BUILD" ]; then
 	hostmakedepends+=" kconfig-devel kcoreaddons-devel kded