Umbrella: React DOM Bugs

Since I was going through all open issues yesterday and today, I also compiled a list of things that seem broken in ReactDOM, grouped by areas. I don’t think all of these issues are equally important but I’d like to start a discussion around how we can start attacking them—both in shorter and in longer term. For example any potential fixes to the onChange event logic would need to take https://github.com/facebook/react/issues/9657 into account (or even inform it). I think it would be a good topic for our next chat, cc @jquense @aweary @nhunzaker. Maybe we could also broadcast it this time? 😃 ## Autofill * [ ] https://github.com/facebook/react/issues/1159 Provide a way to handle browser-autocompleted form values on controlled components * [ ] https://github.com/facebook/react/issues/7328 IE 11 and Edge no longer prompt to remember password on controlled form * [ ] https://github.com/facebook/react/issues/10468 DOM Fixture Form Coverage: Restored State and Auto-fill ## Composition Events ### Issues * [x] https://github.com/facebook/react/issues/10217 Incorrect data in compositionend event when typing Korean on IE11 * [ ] https://github.com/facebook/react/issues/3926 Change event fires too many times when inputing Chinese characters * [ ] <s>https://github.com/facebook/react/issues/8423 onChange does not work well with IE11 at Japanese IME. in React 15.4.0</s> ### PRs * [x] https://github.com/facebook/react/pull/7926 <s>Try to generate a beforeInput event for buggy composition scenarios in IE</s> * [x] https://github.com/facebook/react/pull/8438 Handle composition events in ChangeEventPlugin ## Mouse Enter / Leave * [ ] https://github.com/facebook/react/issues/4251 mouseenter fires on disabled inputs whereas mouseleave does not * [ ] https://github.com/facebook/react/issues/10109 Mouseenter event not triggered when cursor moves from disabled button * [ ] https://github.com/facebook/react/issues/7135 onMouseEnter propagation in double reactroot * [ ] https://github.…