Make WindowManager use WindowModel.

Some more work on the channel who plugin.

Make Connection return a WindowModel.

Start to move FrameContainers behind an iface so they can be
pulled out.

For now, just cast back when needed.

Make Chat return a WindowModel.

Start to move FrameContainers behind an iface so they can be
pulled out.

For now, just cast back when needed.

Switch BiMap from DoubleMap.

Start unit test for GenericTableModel.

Make Error stuff use interface, not implementation.

Remove usages of Query.getHost()

Convert ErrorPopup to use MultiSet

Fix prefs category loading.

Fix header names in URLHandlers prefs dialog.

When loading a category, don't also create UI for the subcategories.
This is weird and doesn't make sense, and is also the reason we
needed the hacky NoRemovePanel.

Previously, we added a category, then created a new panel for
each of its subcategories. When you clicked on the subcat
we made it again with a new panel, and the component ended
up on both (because it couldn't be removed from the old one).

Add Edit support to GenericTableModel, use it for updates.

Replace MapList with Multimap.

Fix error popup disagreeing with error counts.

Remove URLHandlerTableModel.

Remove JXLayer, migrate to JLayer.

Remove backbuffer timestamp completely.

Add framework for channel who plugin.

Add raw support in debug plugin.