Added icon for inplace imports to metadata agent's IconManager
Added inplace import icon to metadata view
Check if symlinks exist.
Removed an unnecessary import
Added file transfer namespace constant to AnnotationData
Implemented transfer link check
Added missing comment for setTransferLinks() method
Merge pull request #2148 from dominikl/rebased/develop/inplace-import-icon-dev_5_0

Inplace import icon dev 5 0, 11970 (rebased onto develop)