fix bug with search and no samples selected
fix bug with search and no samples selected

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