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don't allow sharing if awaiting approval

wasade/qiita,josenavas/QiiTa,squirrelo/qiita,antgonza/qiita,biocore/qiita,adamrp/qiita,RNAer/qiita,josenavas/QiiTa,ElDeveloper/qiita,RNAer/qiita,biocore/qiita,adamrp/qiita,antgonza/qiita,wasade/qiita,josenavas/QiiTa,RNAer/qiita,squirrelo/qiita,josenavas/QiiTa,adamrp/qiita,antgonza/qiita,biocore/qiita,squirrelo/qiita,ElDeveloper/qiita,ElDeveloper/qiita,squirrelo/qiita,biocore/qiita,ElDeveloper/qiita,wasade/qiita,RNAer/qiita,adamrp/qiita,antgonza/qiita