simple tuning of download graphs
renamed navbar controls
More navigation naming & structure changes, and icons.
Batch DOM updates to improve speed with less reflows.
Merge remote-tracking branch 'origin/master' into quick_download_limit
Performance improvements for many downloads.
Merge pull request #40 from carlmon/NavChanges

More navigation naming & structure changes, and icons.
Merge pull request #41 from carlmon/Performance

Performance improvements for many (>200) downloads
Merge remote-tracking branch 'origin/master' into quick_download_limit