datastreams: Broadcast data changes.

Change-Id: Iedf07a9ef59a695cb56c2e160f269cd5d542735b
datastreams: Wait with import if we need to repaint.

Change-Id: I31e8371999afafeeaad201496becf1f2f9d8d276
CheckInverted() is not used anywhere.

Change-Id: I5d22948314a16370d7ac75bfd25151cfa04a2491