Merge branch 'bug-10878_Getting_Start_Widget_Not_Accept_Focus' of git…

…hub.com:WhiteHsu/theia into bug-10878_Getting_Start_Widget_Not_Accept_Focus

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To modify getting-started-contribution.ts to pass activate to the openView methods.
To focus on the first available link in getting-started-widget.tsx.
[Question] But the warning below still exists. May I ask your kind suggestion? Thank you very much.
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WARN Widget was activated, but did not accept focus after 2000ms: getting.started.widget
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