(bug 43479) make 'Pagetriage-tags-tooltip' less negative.

see https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Pagetriage-tags-tooltip/en

Change-Id: I76d106bd07d73965a00f61e4d36cb4d8435c8fc1
Merge "(bug 43479) make 'Pagetriage-tags-tooltip' less negative."