Posts list: show part of excerpt is post has no title #230

Job	Run time
Determine Matrix	2s
Multisite Default / Test current	14m 31s
Single Site Memcached / Test current	13m 42s
Single Site Default / Test current	14m 2s
Multisite Memcached / Test current	14m 11s
Compare / Multisite Default	11s
Compare / Single Site Memcached	15s
Compare / Single Site Default	11s
Compare / Multisite Memcached	12s
Slack Notifications	-1s
Failed workflow tasks	-1s
	57m 15s

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