useBindToQueryString improvements

[ascott18]

• Mutate the browser URL directly (same as we do with bindKeyToRouteOnCreate) in "replace" mode (and maybe even also in "push" mode) so that we can use a more specific key with router-view without vue-router re-creating our entire component every time.
  • This should also eliminate the really ugly hacks in there now involving coalescePendingQuery.
  • This will enable KeepAlive around a route to be able to be particular about the query string matching.
• Support onDeactivated and onActivated hooks to avoid making updates while suspended in a KeepAlive.
• Turn parameters into an options object