gs-plugin-loader: Reset online-updates-timestamp only when did the update
The gs_plugin_loader_generic_update() is used in two cases, when updating the software and when downloading the software. The former case can reset the online-updates-timestamp, but the later not, because it did not update anything. This blocks the update notifications from showing up after the first run of the Software.
wip/mcrha/update-notifications in 4 minutes and 38 seconds2 jobs for