1. #430, add command option -capture_to_disk [name_of_capture] and -capture_snapshot id_of_snapshot for non-GUI users
2. #442, add command option -portable_mode to store PW data files under "user_data" within program installation directory
3. #443, add command option -care_process to only restore windows of whitelisted apps
4. Improve usability of webpage commander, remap Z key to switch background web browser window to foreground.