EXP-1194 FIX -- Update New tag behavior to update Newness timestamp when...

EXP-1194 FIX -- Update New tag behavior to update Newness timestamp when Received Items panel is open and do not auto open Received Items panel

* Updated inbox freshness time setting name to "LastInventoryInboxActivity"
* New time stamp reflects time of last activity performed on the inbox by the user
* Selection and opening items in the inbox both count as activity on the inbox
* Focus going to the inbox panel counts as activity on the inbox
* Creation date of folders now computed based on date of items being added to them
* Creation date of folders no longer relies on queries for creation date, as is done during sorting
* Folders are assumed to be "new" if no inbox freshness time setting is saved