Bug 896103 - NodeListActor's items() response has unnecessary nesting. r=harth

--HG--
extra : rebase_source : b589da834403503959b357f91e989b77e47a2d32
Add paused listeners before resumptions to avoid an intermittent test failure (bug 895426); r=me
Merge m-c to fx-team.
Set the logging pref before loading the debugger server if it is to use it (bug 896534); r=rcampbell
Another attempt to fix an intermittent Mac-only test failure (bug 895426); r=me
merge m-c to fx-team
Merge latest green fx-team changeset and mozilla-central