Fix packaged build: weak ptr timing, factory module, hard refs, brace fix

Critical fixes for packaged builds:
- Widget weak ptrs (SpawnManager/SceneSerializer) are null in packaged due to
  HUD deferred init. All button lambdas now get references fresh from
  PlayerController via GetOwningPlayer() cast instead of cached weak ptrs.
- HUD BeginPlay deferred by one tick (SetTimerForNextTick) to ensure
  PlayerController has initialized SpawnManager before wiring.

Module split:
- Factories moved to separate PS_EditorTools module (Type: Editor)
  to fix UHT error with UFactory in packaging builds.
- PS_Editor module no longer depends on UnrealEd for factories.

Asset references:
- TSoftObjectPtr/TSoftClassPtr changed to TObjectPtr/TSubclassOf for
  MasterCatalog, SpawnCatalogs, and ActorClass entries. Hard references
  ensure assets are cooked in packaged builds.

Other fixes:
- GetActorLabel() replaced with GetClass()->GetName() (editor-only API)
- Missing brace in Browse dialog BaseLevel sync code
- BaseLevel sync only when scenario specifies a LevelName (no more clearing on empty)
- Save As dialog with native Windows file picker
- Debug info in catalog UI when empty (shows chain: Master→Catalogs→Entries)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Unreal/Build/Windows/Engine/Extras/GPUDumpViewer/OpenGPUDumpViewer.sh

@@ -0,0 +1,105 @@
+#!/usr/bin/env bash
+# Copyright Epic Games, Inc. All Rights Reserved.
+
+set -eu
+
+UNAMEOS="$(uname -s)"
+ADDRESS="127.0.0.1"
+PORT="8000"
+URL="http://$ADDRESS:$PORT/GPUDumpViewer.html"
+
+SCRIPT=$(readlink -f "$0")
+# Absolute path this script is in, thus /home/user/bin
+SCRIPTPATH=$(dirname "$SCRIPT")
+
+pushd "$SCRIPTPATH"
+
+
+GetAllChildProcesses() {
+	local Children=$(ps -o pid= ppid "$1")
+
+	for PID in $Children
+	do
+		GetAllChildProcesses "$PID"
+	done
+
+	echo "$Children"
+}
+
+# Gather all the descendant children of this process, and first kill -TERM. If any child process
+# is still alive finally send a -KILL
+TermHandler() {
+	MaxWait=30
+	CurrentWait=0
+
+	ProcessesToKill=$(GetAllChildProcesses $$)
+	kill -s TERM $ProcessesToKill 2> /dev/null
+
+	ProcessesStillAlive=$(ps -o pid= -p $ProcessesToKill)
+
+	# Wait until all the processes have been gracefully killed, or max Wait time
+	while [ -n "$ProcessesStillAlive" ] && [ "$CurrentWait" -lt "$MaxWait" ]
+	do
+		CurrentWait=$((CurrentWait + 1))
+		sleep 1
+
+		ProcessesStillAlive=$(ps -o pid= -p $ProcessesToKill)
+	done
+
+	# If some processes are still alive after MaxWait, lets just force kill them
+	if [ -n "$ProcessesStillAlive" ]; then
+		kill -s KILL $ProcessesStillAlive 2> /dev/null
+	fi
+}
+
+# trap when SIGINT or SIGTERM are received with a custom function
+trap TermHandler SIGTERM SIGINT
+
+APPS=()
+APPS+=(xdg-open)
+
+if [[ "${UNAMEOS}" =~ "Darwin" ]]; then
+	APPS+=(open)
+fi
+
+CMD=
+for val in "${APPS[@]}"; do
+	CMD="$(command -v "${val}")" || true
+	if [[ -n "${CMD}" ]]; then
+		break
+	fi
+done
+
+if [[ -z "${CMD}" ]]; then
+	echo "ERROR: Browser launch command not found"
+	exit 1
+fi
+
+ARGS=("${CMD}")
+
+ARGS+=("$URL")
+
+echo "Executing:"
+echo
+
+echo "Starting simple webserver..."
+exec python3 -m http.server "$PORT" --bind "$ADDRESS" &
+P1=$!
+sleep 1
+
+echo "${ARGS[0]} \\"
+for ((i=1; i < ${#ARGS[@]}; i++ )); do
+	echo "  ${ARGS[$i]} \\";
+done
+echo
+
+# Start the browser now that the server is running
+"${ARGS[@]}"
+
+# Wait on the webserver - in general this will be killed by a Ctrl-C
+wait $P1
+
+echo
+echo "Closing ${CMD}..."
+
+popd