treewide: include missing package names in deprecation/removal messages

Most deprecation/removal messages already do this, but these were
missing.

Now the user does not have to `--enable-trace` and parse the quite long
trace just to find the package name.

pkgs/top-level/all-packages.nix

@@ -18809,7 +18809,7 @@ in
   wireshark-qt = wireshark;
 
   # The GTK UI is deprecated by upstream. You probably want the QT version.
-  wireshark-gtk = throw "Not supported anymore. Use wireshark-qt or wireshark-cli instead.";
+  wireshark-gtk = throw "wireshark-gtk is not supported anymore. Use wireshark-qt or wireshark-cli instead.";
   wireshark-cli = wireshark.override { withQt = false; };
 
   sngrep = callPackage ../applications/networking/sniffers/sngrep {};
@@ -23338,8 +23338,8 @@ in
     topicons-plus = callPackage ../desktops/gnome-3/extensions/topicons-plus { };
     window-corner-preview = callPackage ../desktops/gnome-3/extensions/window-corner-preview { };
 
-    nohotcorner = throw "removed 2019-10-09: Since 3.34, it is a part of GNOME Shell configurable through GNOME Tweaks.";
-    mediaplayer = throw "deprecated 2019-09-23: retired upstream https://github.com/JasonLG1979/gnome-shell-extensions-mediaplayer/blob/master/README.md";
+    nohotcorner = throw "gnomeExtensions.nohotcorner removed since 2019-10-09: Since 3.34, it is a part of GNOME Shell configurable through GNOME Tweaks.";
+    mediaplayer = throw "gnomeExtensions.mediaplayer deprecated since 2019-09-23: retired upstream https://github.com/JasonLG1979/gnome-shell-extensions-mediaplayer/blob/master/README.md";
   };
 
   hsetroot = callPackage ../tools/X11/hsetroot { };