add getter for content to abstract content node
make get system name() util method public
Added support to refresh content tree by modules
7zip sends event when content added to refresh tree
Merge branch 'master' of https://github.com/sleuthkit/autopsy
add a comment about a bug
preserve selections when refreshing content tree
Dir tree improve back and forward buttons behavior.
Use paths instead of nodes to keep track and do not reset history when tree is refreshed.
Merge remote-tracking branch 'upstream/master'