* enhance(clock): support recording in repeated block
* cleanup: unused namespaces
* cleanup: missing-else-branch if --> when
* enhance: wider search results window for mobile browser
* fix: namespace requirement
Why adding block timestamps?
Block is the atomic unit for logseq instead of a page, with the
timestamps we can do a lot of things, for example:
1. show a blocks timeline related to a topic/project/habit.
2. get latest modified blocks from the page or the whole graph.
3. query dsl can have a (sort-by :last_modified_at) clause
It'll add both created_at and last_modified_at properties to
each block, not all users need this, so, it's an experiment feature,
we'll disable it by default.
Also, this PR simplify the block properties a lot, it might fix some
old issues related to properties.
