Bug#968634: gnome-control-center: online accounts panel does not check whether gnome-online-accounts installed

[Roman Riabenko]

Package: gnome-control-center
Version: 1:3.37.3-1
Severity: normal

Dear Maintainer,

I removed gnome-online-accounts with apt, but its panel in gnome-control-center remained,
even though it turned broken. I expected that removing the package will remove the panel too 
because it is not necessary and does not work properly without the package.

I removed gnome-online-accounts-panel.desktop from /usr/share/applications/ with rm.
It was effective. The broken panel of online accounts disappeared from the control center.

I installed gnome-online-accounts, but the panel in the control center did not re-appear.
I reinstalled gnome-control-center and the panel returned. I expected that reinstalling  
gnome-online-accounts should return the panel because it is necessary to operate the package.

I propose changing the availability of the panel in the gnome-control-center depending on
whether the package gnome-online-accounts is installed or not.

Best wishes
Roman

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 5.7.0-2-amd64 (SMP w/6 CPU threads)
Locale: LANG=uk_UA.UTF-8, LC_CTYPE=uk_UA.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gnome-control-center depends on:
ii  accountsservice            0.6.55-3
ii  apg                        2.2.3.dfsg.1-5+b1
ii  colord                     1.4.4-2
ii  desktop-base               10.0.3
ii  desktop-file-utils         0.26-1
ii  gnome-control-center-data  1:3.37.3-1
ii  gnome-desktop3-data        3.36.4-1
ii  gnome-settings-daemon      3.36.1-1
ii  gsettings-desktop-schemas  3.37.1-1
ii  libaccountsservice0        0.6.55-3
ii  libatk1.0-0                2.36.0-2
ii  libc6                      2.31-3
ii  libcairo2                  1.16.0-4
ii  libcheese-gtk25            3.34.0-1+b2
ii  libcheese8                 3.34.0-1+b2
ii  libcolord-gtk1             0.1.26-2
ii  libcolord2                 1.4.4-2
ii  libcups2                   2.3.3-2
ii  libepoxy0                  1.5.4-1
ii  libfontconfig1             2.13.1-4.2
ii  libgdk-pixbuf2.0-0         2.40.0+dfsg-5
ii  libglib2.0-0               2.64.4-1
ii  libgnome-bluetooth13       3.34.1-1
ii  libgnome-desktop-3-19      3.36.4-1
ii  libgoa-1.0-0b              3.37.90-1
ii  libgoa-backend-1.0-1       3.37.90-1
ii  libgsound0                 1.0.2-4
ii  libgtk-3-0                 3.24.22-1
ii  libgtop-2.0-11             2.40.0-2
ii  libgudev-1.0-0             233-1
ii  libibus-1.0-5              1.5.22-5
ii  libkrb5-3                  1.17-10
ii  libmm-glib0                1.14.0-0.1
ii  libnm0                     1.26.0-1
ii  libnma0                    1.8.30-1
ii  libpango-1.0-0             1.46.0-2
ii  libpangocairo-1.0-0        1.46.0-2
ii  libpolkit-gobject-1-0      0.105-29
ii  libpulse-mainloop-glib0    13.0-5
ii  libpulse0                  13.0-5
ii  libpwquality1              1.4.2-1+b1
ii  libsecret-1-0              0.20.3-1
ii  libsmbclient               2:4.12.5+dfsg-3
ii  libsoup2.4-1               2.70.0-1
ii  libudisks2-0               2.9.0-1
ii  libupower-glib3            0.99.11-2
ii  libwacom2                  1.4.1-1
ii  libwayland-server0         1.18.0-2~exp1
ii  libx11-6                   2:1.6.10-3
ii  libxi6                     2:1.7.10-1
ii  libxml2                    2.9.10+dfsg-5+b1

Versions of packages gnome-control-center recommends:
ii  cracklib-runtime              2.9.6-3.2+b1
ii  cups-pk-helper                0.2.6-1+b1
ii  gkbd-capplet                  3.26.1-1
ii  gnome-online-accounts         3.37.90-1
ii  gnome-user-docs               3.36.2-1
ii  gnome-user-share              3.34.0-2
ii  iso-codes                     4.5.0-1
ii  libcanberra-pulse             0.30-7
ii  libnss-myhostname             246.2-1
ii  network-manager-gnome         1.18.0-1
ii  policykit-1                   0.105-29
ii  pulseaudio-module-bluetooth   13.0-5
ii  realmd                        0.16.3-3
ii  rygel                         0.38.3-1
ii  rygel-tracker                 0.38.3-1
ii  system-config-printer-common  1.5.12-1

Versions of packages gnome-control-center suggests:
pn  gnome-software | gnome-packagekit  <none>
ii  gstreamer1.0-pulseaudio            1.16.2-3
pn  libcanberra-gtk-module             <none>
ii  libcanberra-gtk3-module            0.30-7
ii  x11-xserver-utils                  7.7+8

-- no debconf information