Build - improve macOS release script

Don't clobber original app build - rather create a new macOS_Release dir and copy and make "release ready" in there - leaving the original untouched.

Fix directory level due to recent structural changes to paths.

Return shell to directory it was in before the script started.

Author: samaaron

app/mac-release.sh

@@ -2,20 +2,32 @@
 set -eux # Quit script on error
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+CURRENT_DIR="$( pwd )"
 
-cd "${SCRIPT_DIR}/build/gui/qt/Sonic Pi.app/Contents/Resources"
+cd "${SCRIPT_DIR}/build/"
+mkdir -p macOS_Release
+rm -rf macOS_Release
+mkdir -p macOS_Release
+
+cp -R 'gui/qt/Sonic Pi.app' macOS_Release/
+
+cd "macOS_Release/Sonic Pi.app/Contents/Resources"
 
 rm app etc server
 mkdir app
-cp -R ../../../../../../../app/server app/server
-cp -R ../../../../../../../etc .
+cp -R ../../../../../../app/server app/server
+cp -R ../../../../../../etc .
 ln -s app/server .
 
 mkdir -p app/gui/qt
-cp -R ../../../../../../../app/gui/qt/theme app/gui/qt/
+cp -R ../../../../../../app/gui/qt/theme app/gui/qt/
+
+../../../../../../app/gui/qt/prune.rb app/server/ruby/vendor
+
+cd "${CURRENT_DIR}"
 
-../../../../../../../app/gui/qt/prune.rb app/server/ruby/vendor
+echo "
 
-echo "build/Sonic Pi.app is now ready for signing, notarising and releasing..."
+app/build/macOS_Release/Sonic Pi.app is now ready for signing, notarising and releasing...
 
-cd "${SCRIPT_DIR}"
+"