correct package app status refresh for first boot

fixes bug introduced by 3d8b3e0 . the issue the runonce was trying to workaround was already resolved in 8813df9 (now slightly modified since then, but still achieving the same result).

this was the root cause for the possibility of duplicated shlink clicks on first boot for already installed package apps.

in addition, make refresh_all_pkgapp_status blocking for the preload-daemon since it is much faster than it once was. this will result in the generated listfiles always being up to date.

etc/preload-daemon

@@ -55,7 +55,7 @@ fi
 if [ "$(stat -c %Y /var/lib/dpkg/status 2>/dev/null)" != "$(cat "${DIRECTORY}/data/preload/timestamps-dpkg-status" 2>/dev/null)" ];then
   echo "Refreshing pkgapp_status..." 1>&2
   stat -c %Y /var/lib/dpkg/status 2>/dev/null > "${DIRECTORY}/data/preload/timestamps-dpkg-status"
-  refresh_all_pkgapp_status &
+  refresh_all_pkgapp_status
 fi
 
 #get modified timestamps for files/directories in the pi-apps folder

etc/runonce-entries

@@ -52,16 +52,6 @@ runonce <<"EOF"
   fi
 EOF
 
-#regenerate package-app status for one-time migration
-runonce <<"EOF"
-  IFS=$'\n'
-  for app in $(list_apps package) ;do
-    rm -f "${DIRECTORY}/data/status/${app}" || exit 1
-  done
-  
-  refresh_all_pkgapp_status
-EOF
-
 # remove deprecated apps (only when running in a visible terminal)
 case $(ps -o stat= -p $$) in
   *+*) # Running in foreground