The zero results can either be because there are no notifications
at all for this user in the local wiki, or because there are no
results for the specific filter. Both messages are used for either
case.
Also, clean up the display of push/pop pending for the inbox widget
and hide the label in case the message count is 0 or 1 notifications
as it is unhelpful and irrelevant in these cases.
Bug: T136586
Bug: T136574
Bug: T129363
Change-Id: I1465f772bb9f5247df645d6612f951e5fd7d38cf
Changing the way Echo's front-end architecture works to work with
model-view-controller methodology.
Change-Id: I97862402c41bc04dd41cd08d79f19ff677340249