Display changed fields on the frontpage as well

[Shiroizu]

Is your feature request related to a problem? Please describe. (required)

The frontpage's "Recent activity" -section displays rather unhelpful messages "updated song".

The corresponding list on the separate "Recent activity" -page looks like this:

The frontpage has more eyes compared to https://vocadb.net/ActivityEntry, so it'd make sense to include the changed fields on the frontpage as well.

Consecutive activity entries by the same user for the same entry are "merged" on the frontpage (good for visibility), which is probably the reason that the frontpage drops the information on changed fields.

One approach for this would be to "merge" the changed fields:

updated song (Artists, Lyrics, Languages)
created a new song (Artists, Names, PVs)

--> created a new song (Artists, Names, PVs, Lyrics, Languages)

updated song (Artists, Lyrics)
updated song (PVs)

--> updated song (PVs, Artists, Lyrics)

Checklist (required)

• Searched VocaDB/vocadb for duplicate issues.