Snap Store: unmark as hidden and reland updates with corrections

follows official instructions https://snapcraft.io/docs/installing-snap-on-debian and removes some entirely unnecessary commands

apps/Snap Store/install

@@ -15,17 +15,25 @@ fi
 
 sudo snap refresh
 sudo systemctl restart snapd.service || error "Unable to restart snapd.service"
-sudo modprobe squashfs || exit 1
+enable_module squashfs || exit 1
 
-sudo snap install core18 || error "Snapd was unable to install core18"
+# install the core snap which obtains the latest snapd
 sudo snap install core || error "Snapd was unable to install core"
-sudo snap install snapd || error "Snapd was unable to install snapd"
-
-sudo ln -s /var/lib/snapd/snap /snap
 
 echo "Output of 'snap version':"
 snap version
 sudo snap install snap-store || error "Unable to install snap store"
+
+# correct orphaned directory from older script 
 sudo rm -rf /usr/share/applications/snap
-ln -s /var/lib/snapd/desktop/applications /usr/share/applications/snap || sudo ln -s /var/lib/snapd/desktop/applications /usr/share/applications/snap || error "Failed to create symlink for Snap app shortcuts!"
 
+#Pi-Apps tries to avoid unnecessary reboots at all cost. Snap places desktop launchers in /var/lib/snapd/desktop/applications, which is not searched by default.
+#This path is added to $XDG_DATA_DIRS on the next reboot, but we don't want to wait for that!
+#If there are files in /var/lib/snapd/desktop/applications, and XDG_DATA_DIRS is missing snap paths, then bind-mount to /usr/share/applications
+if [[ "$XDG_DATA_DIRS" != */var/lib/snapd/desktop* ]] && [ ! -z "$(ls /var/lib/snapd/desktop/applications)" ] && [ -z "$(ls /usr/share/applications/snapd-temporary)" ];then
+  sudo mkdir -p /usr/share/applications/snapd-temporary
+  sudo mount --bind /var/lib/snapd/desktop/applications /usr/share/applications/snapd-temporary
+elif [[ "$XDG_DATA_DIRS" == */var/lib/snapd/desktop* ]] ;then
+  sudo rm -rf /usr/share/applications/snapd-temporary
+fi
+#Additionally, PiOS Buster had a bug where XDG_DATA_DIRS was missing snap's entries due to PiOS mods. Pi-Apps fixes this with a runonce.

apps/Snap Store/uninstall

@@ -1,5 +1,5 @@
 #!/bin/bash
-sudo rm -rf /var/snap/snap-store
+sudo rm -rf /var/snap/snap-store /usr/share/applications/snapd-temporary
 if command -v snap >/dev/null ;then
   sudo snap remove snap-store || error "The snap command failed to uninstall snap-store\nPerhaps running this command would fix it?\nsudo apt install --reinstall snapd"
 

etc/categories

@@ -165,7 +165,7 @@ Shattered Pixel Dungeon|Games
 Shotwell|Creative Arts
 SimpleScreenRecorder|Multimedia
 Snapdrop|hidden
-Snap Store|hidden
+Snap Store|Tools
 Sonic Pi|Multimedia
 SpeedTest-CLI|Internet
 Sphero SDK|Programming