(bug 42074)  All notifications… is sometimes unnecessary
(bug 42074)  All notifications… is sometimes unnecessary

Only show 'All notifications' link if there is notification to show

Change-Id: If3f87ef07b9aaa5a30d2e1e52c8f7a6d445d8eb4

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo