Revamp the UI

[mgedmin]

Something Bootstrapy. With asynchronous parts for slow-loading bits (history).

Bits of information that may be interesting to see, for an object:

• Header:
  • Object ID (in hex) -- perhaps it's enough to see this in the URL bar?
  • Object type (class + list of proxies)
  • Object path (if can be determined from parent pointers; if not, try to remember the series of clicks I took to get here)
  • Object size (size of the state pickle -- but maybe I should also add the size of the class pickle)
  • Transaction ID that is being displayed
• Object state:
  • attributes
  • items
  • raw object state pickle bytes (disassembled using pickletools of both pickles -- the class pickle and the state pickle
  • object position in the file, assuming FileStorage
  • offset and size of the object record
  • offset and size of the transaction record
• History:
  • list of transactions that changed this object
  • show state change diffs
  • show transaction metadata (user, user location, note, description, location, request type, other extended attributes if present)
  • link to historical state versions
• References to other objects (perhaps redundant: current object state should link to them)
• Backreferences from other objects (expensive to compute)

The page theme should change if I'm looking at a historical version.

I'm thinking of a layout like this:

+-----------------------------+
| header                      |
.---------.---------.---------.
|  State  |   Raw   | History |
|         ~~~~~~~~~~~~~~~~~~~~|
| info                        |
|                             |
+-----------------------------+

[mgedmin]

I want History to be loaded asynchronously, because it's expensive. I also want it paginated.

Things like Backreferences would need an asynchronous solution, because I'd have to walk the entire database, to reverse the object graph. By async solution I mean: a visible progress bar in the browser window.