Enhanced DistributedObjectAdmin to compare for inconsistencies between instances

[jskupsik]

Hoist P/R Checklist

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• Caught up with develop branch as of last change.
• Added CHANGELOG entry, or determined not required.
• Reviewed for breaking changes, added breaking-change label + CHANGELOG if so.
• Updated doc comments / prop-types, or determined not required.
• Reviewed and tested on Mobile, or determined not required.
• Created Toolbox branch / PR, or determined not required.

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[jskupsik]

Hoist-core PR: xh/hoist-core#426
No toolbox PR.

[lbwexler]

I think the UI can be adjusted a bit to take better advantage of the space
how about we make the main tree grid narrow, allowing the wide instance grid to go to the right, with the instance detail below it?

Would also like to see a single button for "Clear All Hibernate Caches" in the top toolbar. The ability to clear individual hibernate caches can appear as a context menu item, only appearing if entire selection is made up of Hibernate caches

[lbwexler]

• Broke out the detail panel from the main report panel, in order to just break this thing up a bit.
• Made a number of additional UI tweaks and simplifications that we can go over tomorrow.
  cr: jakub (pending)