gh-787 - DocExplorer needs to pull down tree
gh-787 - DocExplorer needs to pull down tree

The modal does this as well, so we're pulling it down twice.
We should perhaps wrap the main DocExplorer in another component.

gchq/stroom,gchq/stroom,gchq/stroom,gchq/stroom,gchq/stroom,gchq/stroom