Better UI of right boxes, less bracket by edit

Boxes of metaattributes and bins (values) have newly search box, which
filter available buttons. These boxes have fixed height and overflow-y:
auto.
Bins box have two available groups - bins and values. Bins have title,
which shows values inside bin.
Operators are together with brackets and logic gates.
Rule edit is with less brackets as before, only if they have reason to
be there.

Validation (on "Save rule" button event) is not repaired yet, it
validates bad now.