reliability improvements

README.md

examples/python/test-infos.py

src/alpm_utils.vala

src/cli.vala

src/database.vala

src/manager_window.vala

src/meson.build

src/system_daemon.vala

src/transaction-cli.vala

src/transaction-gtk.vala

src/transaction.vala

src/transaction_interface_root.vala

src/tray-appindicator.vala

src/tray-gtk.vala

src/tray.vala