nwg-shell-config 0.3.12

• added the nwg-shell-updater entry point, that replaces the nwg-shell-installer -u CLI command, and displays the updater GUI; it will be started automagically by the nwg-shell-check-update script, via the notification actions;
• the first visible tab in nwg-shell-config now contains the 'Updates' icon, which indicates pending updates, if any; if you dismiss a proposed update, you may always start it from here;
• the updater won't check/apply pre-0.3.0 updates; on machines not yet updated to nwg-shell 0.2.5 you may need to run nwg-shell-installer -a to overwrite config files with defaults;
• performing the 0.3.0 update will remove all the helper scripts from your home directory, as they are now installed to /usr/local/bin.