Remove Furan 1 & Furan 2 UI Enhancements

[bkeroackdsc]

This removes all support for legacy Furan v1 and makes Furan v2 mandatory for server deployments. It adds UI enhancements which allow users to view image build logs in the web UI in realtime during environment creation, and fixes some longstanding minor bugs in the status view.

• In the event status view, node tooltip windows now persist and have a close 'x' button.
• The image build button within the node tooltip window is now clickable while builds are running.
• Image build buttons have an animated spinner while builds are pending for a visual cue.
• When the image build button is clicked, a modal is displayed with image build logs that auto-refresh once per second.
• Unrelated to image builds, the tree view DAG in the status view now autoscales based on tree depth (previously, a tree with many levels would scroll out of view).

Node tooltip window with image build spinner (image build button is clickable):

Image build log modal:

Fixes #87 #93