missing-list-entry: Fix double <child> tag
DefaultTimeline: Also *show* the MissingListEntry
Merge branch 'continuous' of https://github.com/baedert/corebird into continuous

Conflicts:
	src/DefaultTimeline.vala
	ui/missing-list-entry.ui
ITimeline: Also set the max_id in load_newest_internal
MissingListEntry: Set text of the 'interrupted' state

Also, fix the test case