Linux - Replace legacy desktop integration with modern XDG-based integration

Replace manual placement of .desktop files with modern XDG-based install process.

Update .desktop file to leverage modern XDG functions (namely, the ability for an application to request to be ran on the system's most powerful GPU, useful for hybrid graphics setups).

Also provides provisions for launching the viewer on the iGPU and associating SLURLs via the desktop file, accessible by right-clicking the desktop shortcut.

indra/newview/linux_tools/refresh_desktop_app_entry.sh

@@ -2,11 +2,19 @@
 
 VIEWERNAME="Alchemy" #Store the viewer's name as a variable, for portability. This should be correctly capitalized.
 
+CHANNELNAME="AgileAkita" #THIS CAN BE BLANK! Store the viewer's channel (i.e. alpha, beta, etc.) as a variable, for portability. This should be correctly capitalized. Release versions should leave this blank, so the DE will show just VIEWERNAME, not VIEWERNAME CHANNELNAME
+
 SCRIPTSRC="$(readlink -f "$0" || echo "$0")"
 RUN_PATH="$(dirname "${SCRIPTSRC}" || echo .)"
 
 install_prefix=$(builtin cd "${RUN_PATH}/.." || exit; pwd) #This is a cleaner way of getting the absolute path for the install directory.
 
+function print() {
+	log_prefix="${VIEWERNAME}${CHANNELNAME}DesktopIntegration:"
+	echo -e "${log_prefix} $*"
+}
+
+
 function install_desktop_entry()
 {
 	local installation_prefix="${1}"
@@ -15,7 +23,7 @@ function install_desktop_entry()
 	cat >"${desktoppath}" <<desktopfile || print "Warning: Could not write $desktoppath"s
 [Desktop Entry]
 Version=1.4
-Name=${VIEWERNAME}
+Name=${VIEWERNAME} ${CHANNELNAME}
 GenericName=Second Life Viewer
 Comment=Client for the Online Virtual World, Second Life
 Exec=${installation_prefix}/${VIEWERNAME,,}
@@ -24,7 +32,7 @@ Terminal=false
 Type=Application
 Categories=Game;Simulation;
 StartupNotify=true
-StartupWMClass=${VIEWERNAME}
+StartupWMClass=${VIEWERNAME} ${CHANNELNAME}
 PrefersNonDefaultGPU=true
 Actions=DefaultGPU;AssociateMIME;
 
@@ -40,14 +48,16 @@ Name=Associate SLURLs
 Comment=Set this viewer as the default handler for secondlife:// links.
 desktopfile
 
+#The above adds some options when the shortcut is right-clicked, to launch on the default (usually integrated) GPU, and to force MIME type association.
+
 #The "PrefersNonDefaultGPU" line should automatically run the viewer on the most powerful GPU in the system, if it is not default. If it is, this is ignored.
 
 # NOTE: DO NOT CHANGE THE "GenericName" FIELD - ONLY CHANGE THE "Name" FIELD. (This is to ensure that searching "Second Life" will show all the viewers installed in a user's system, regardless of their canonical name.)
 
-	echo " - Installing menu entries via XDG..."
+	print "Installing menu entries via XDG..."
 	xdg-icon-resource install --novendor --size 256 "${install_prefix}/${VIEWERNAME,,}_icon.png" ${VIEWERNAME}-Viewer
 	#NOTE: Above command takes the path to the icon to install && The name of the icon to be used by XDG. This should always be in the format of "x-Viewer" to avoid potential naming conflicts, as per XDG spec.
-	xdg-desktop-menu install --novendor ./${VIEWERNAME,,}-viewer.desktop
+	xdg-desktop-menu install --novendor "${installation_prefix}"/${VIEWERNAME,,}-${CHANNELNAME}-viewer.desktop
 }
 
 if [ "$UID" == "0" ]; then