Disable some perf tests temporarily
Batch updates to caret state and redraw once after all state changes are made

TODO
- API dox
- Tests?
Include webodf-specified formatting properties by default

Every existing use of this function will return better data if the system
defaults are included.
fixup! Batch updates to caret state and redraw once after all state changes are made
WIP refactor style summary lookup to cache common information