Useless descriptions in RSS (BB-7091)

I'm a heavy user of the Dashboard RSS feed to follow and manage projects. However, many of the items are useless as they don't provide actual information, or links to the related objects, nor related comments.

These items include wiki edits and wiki page creation, approval of commits (only says things like "larsivi cset_like amber"), commenting on commits at the very least.

To make things worse, it seems to be impossible to "see more" on the Dashboard or Project overview pages in case there is so much activity that what I've not really read about in the RSS is no longer in view on the webpage.