Pass the movie library to `register_shape` methods so that bitmap
charcter IDs can be resolved immediately on the proper SWF.
This fixes#2037, which cause incorrect bitmaps to be used when
multiple movies were loaded.
Text fields without variables would return as unbound in
EditText::try_bind_text_field_variable, causing them to be added
to the unbound textfield list even though they had no variable
setting. Return successful bidning by default to avoid adding
these textfields to the unbound list.
Add --timedemo for benchmarking, which will run the given SWF as
quickly as possible for 5000 frames or the end of the root
timeline, whichever comes first. The total duration will be output
upon completion.
Previously pressing left with a selection would set `selection.to = selection.start() - 1`, now it sets it to `selection.to = selection.start()`. The same is true for right/selection.end()
Event dispatch is a surprisingly complicated procedure, so this makes sure to test:
1. Event dispatch on bare dispatchers
2. Event dispatch on hierarchial dispatchers (movieclips)
3. Event cancellation (which is reported by `dispatchEvent`)
4. The implicit `this` on unbound event handlers. I'm not yet sure if this is a special property of event dispatch or if all unbound functions inherit their global scope as `this`.
5. The execution order of handlers on both bare and hierarchial dispatchers
6. Delegation to hierarchial dispatchers
7. Modification of the dispatch list during dispatch of an event. Surprisingly enough, you can add handlers to the event you're handling and expect them to execute, *if* you added them to a further object in the order *or* you added a bubble handler in the capture phase.
For various reasons, we store the dispatch list for an object on a separate property of an `EventDispatcher` rather than dictating that all children of `EventDispatcher` use a specific object type. This is because `EventDispatcher` is a very general class with lots of object representations it needs to cover. So instead, we introduce a new object representation for a *property* and store it in a Ruffle private namespace that is as isolated from user code as alternate object representations are.