First, the default default date range used on Overview panel is made
configurable (setting OVERVIEW_DAYS_RANGE). Second, its default value
is set to 1 day. Changing the default behavior is aimed to improve
load time of the default page in the presence of large amounts of
data. If OVERVIEW_DAYS_RANGE setting is explicitly set to None, the
behavior remains the same - the default date range is from the
beginning of the current month until today.
Co-Authored-By: Dmitry Sutyagin <dsutyagin@mirantis.com>
Change-Id: I55a0397f69e33ba9c8fb1f27d57838efcd8648af
Closes-Bug: #1508571
5da5fd3196