Add QRulePasteType.

This is the UTI used for dragging/dropping rules in the rules table.
Move options to a constant QCaptureObservedChanges.
Remove hard font-size limit.

So, you can now pick whatever font size you want, just keep in mind that
sufficiently large fonts will get clipped.
TODO Note on observation for arrays.

Would be good to move to a call that works for arrays.
All options passing for observation via rebind calls.
Observe rules changes.

Otherwise, there'll be a leak from observing keys for each rule.
Whitespace between methods.
Remove explicit calls to didChangeValueForKey.

It's observed, this isn't necessary.
Partial drag-and-drop support for reordering rules.

Can also copy a rule from one scheme to another by drag and drop, if
the rule is moving across tables.
Align assignments.