Increase update rate for REPL editor value

[remo5000]

Typing in something, then evaluating it, will cause the old text to be placed back into the text editor. This also causes buggy behaviour (invisible REPL value) after code execution.

This behaviour happens because the EVAL_REPL action is called before the UPDATE_REPL_VALUE action (due to the throttle).

[remo5000]

Evaluation (called by the component's dispatch prop) can be preceded by a (non-throttled) dispatch to update the value. This should cause the actions to occur in the correct order.

[ning-y]

Related: #147

[ning-y]

Can we remove throttling for editor/repl values? Old source academy also updated with every keypress, but it didn't affect performance. I think the additional stuff we have to add in to fix this issue creates more mess than what throttling solves for us.

[remo5000]

Yeah, I think we can do that.