systemd: assign default slices to user services

As per recommendations in the systemd documentation, assign session, app
or background slice allocations to the standard user services:
https://github.com/systemd/systemd/blob/master/docs/DESKTOP_ENVIRONMENTS.md#pre-defined-systemd-units

Signed-off-by: Joe Groocock <me@frebib.net>

systemd/user/blueman-applet.service

@@ -5,9 +5,9 @@ Requires=graphical-session.target
 ConditionPathExists=/sys/class/bluetooth
 
 [Service]
-Type=simple
 ExecStart=/usr/bin/blueman-applet
 Restart=on-failure
+Slice=background.slice
 
 [Install]
 WantedBy=desktop.target

systemd/user/dunst.service.d/override.conf

@@ -0,0 +1,2 @@
+[Service]
+Slice=session.slice

systemd/user/i3.service

@@ -8,6 +8,7 @@ After=xprofile.service xorg.target
 ExecStart=/usr/bin/i3
 ExecReload=/usr/bin/i3-msg reload
 Restart=always
+Slice=session.slice
 
 [Install]
 WantedBy=graphical-session.target

systemd/user/networkmanager-applet.service

@@ -7,6 +7,7 @@ Requires=graphical-session.target
 Type=simple
 ExecStart=/usr/bin/nm-applet
 Restart=on-failure
+Slice=background.slice
 
 [Install]
 WantedBy=desktop.target

systemd/user/nextcloud.service

@@ -4,11 +4,10 @@ Requires=graphical-session.target
 After=graphical-session.target
 
 [Service]
-Type=simple
 ExecStart=/usr/bin/nextcloud --background
 ExecReload=/bin/kill -HUP $MAINPID
-KillMode=process
 Restart=on-failure
+Slice=app.slice
 
 [Install]
 WantedBy=desktop.target

systemd/user/parcellite.service

@@ -6,6 +6,7 @@ After=xorg.target
 
 [Service]
 ExecStart=/usr/bin/parcellite -n
+Slice=session.slice
 
 [Install]
 WantedBy=graphical-session.target

systemd/user/picom.service

@@ -4,9 +4,9 @@ Requires=graphical-session.target
 After=dbus.service graphical-session.target xorg.target
 
 [Service]
-Type=simple
 ExecStart=/usr/bin/picom --experimental-backends --dbus
 Restart=always
+Slice=session.slice
 
 [Install]
 WantedBy=desktop.target

systemd/user/polybar@.service

@@ -4,10 +4,10 @@ Requires=graphical-session.target
 After=graphical-session.target pulseaudio.socket i3.service
 
 [Service]
-Type=simple
 ExecStart=/usr/bin/polybar --reload --log=warning %i
 ExecReload=/usr/bin/polybar-msg cmd restart -p $MAINPID
 Restart=always
+Slice=session.slice
 
 [Install]
 WantedBy=desktop.target

systemd/user/pulseaudio.service.d/override.conf

@@ -0,0 +1,2 @@
+[Service]
+Slice=session.slice

systemd/user/redshift.service.d/override.conf

@@ -0,0 +1,2 @@
+[Service]
+Slice=session.slice

systemd/user/solaar.service

@@ -8,6 +8,7 @@ Type=simple
 ExecStart=/usr/bin/solaar --debug --restart-on-wake-up --window=hide
 KillMode=process
 Restart=on-failure
+Slice=background.slice
 
 [Install]
 WantedBy=desktop.target

systemd/user/wallpaper.service

@@ -4,12 +4,12 @@ Requires=graphical-session.target
 After=graphical-session.target
 
 [Service]
-Type=simple
 Environment=FEH_OPTIONS="--no-fehbg --no-xinerama"
 Environment=WALLPAPER=/home/frebib/pictures/lakesidesunrise.jpg
 ExecStartPre=feh $FEH_OPTIONS --bg-fill $WALLPAPER
 ExecStart=/bin/sh -c "xev -root -event randr 2>&1 | while awk -v RS=\\n\\n '{exit;}'; do echo 'Applying wallpaper'; feh $FEH_OPTIONS --bg-fill $WALLPAPER; done"
 Restart=always
+Slice=session.slice
 
 [Install]
 WantedBy=desktop.target

systemd/user/xautolock.service

@@ -7,6 +7,7 @@ After=xorg.target
 ExecStart=/usr/bin/xautolock -time 5 -locker 'dm-tool switch-to-greeter' -detectsleep -resetsaver -secure
 KillMode=process
 Restart=on-failure
+Slice=session.slice
 
 [Install]
 WantedBy=graphical-session.target

systemd/user/xbindkeys.service

@@ -4,6 +4,7 @@ Description=XBindKeys
 [Service]
 ExecStart=/usr/bin/xbindkeys -n -f $XDG_CONFIG_HOME/X11/xbindkeysrc
 KillMode=process
+Slice=session.slice
 
 [Install]
 WantedBy=graphical-session.target

systemd/user/xprofile.service

@@ -7,6 +7,7 @@ After=xorg.target
 Type=oneshot
 RemainAfterExit=yes
 ExecStart=/bin/sh -c '. $XDG_CONFIG_HOME/X11/xprofile; systemctl --user import-environment'
+Slice=session.slice
 
 [Install]
 WantedBy=xorg.target

systemd/user/xsettingsd.service

@@ -7,6 +7,7 @@ After=xorg.target
 ExecStart=/bin/sh -c 'xsettingsd -c $XDG_CONFIG_HOME/xsettingsd/xsettingsd.local'
 ExecReload=/bin/kill -s HUP $MAINPID
 Restart=always
+Slice=session.slice
 
 [Install]
 WantedBy=graphical-session.target