Merge pull request #379 from ChaoPang/master

fixed the sorting of data items in catalogue after searching
removed 'w' in function
Merge branch 'master' of https://github.com/molgenis/molgenis
Merge pull request #380 from RoanKanninga/master

removed 'w' in function
hide tree top node if the search result is null
Merge branch 'master' of https://github.com/molgenis/molgenis