Add re-scan when addon is enabled after logging in with it being disabled

[rdw-software]

Right now, the addon relies on the initial BAG_UPDATE_DELAYED events to start the scanning process. However, if one disables it, then logs in, and THEN enables it, no such event will be fired. As a result, then cache will not be updated until another event causes it.

This can be easily fixed by scanning once after logging in, even if it adds another obsolete scan after the regular bag updates when logging in normally.