This ensures that when viewing an issue each note already has the
associated project, project members, group and group members available.
Since this information is requres for every note this results in quite
the reduction of SQL queries being executed.

This ensures we don't end up running N+1 queries for the objects in the
affected collections.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

This reverts commit 4c586dc7.

This reverts commit fbdaf0e2.

**What does this do?**
It makes sure that whenever a new note is added to an noteable item, the
updated_at of that item is also updated.

**Why is this needed?**
At this moment when you post a comment on an issue or add a label to an issue,
the updated_at is not changed. Because of this the filtering for least recently
updated is not really useful (since it only takes in account the original text
from the noteable).

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>