Fixed Progressbar Dispatcher Exception

[Sparrkle]

Removed Dispatcher and change how it works storyboard.

What's the PR

• broken progressbar sometimes.

[taooceros]

Will this make the progressbar always run in the background? people has complaint about the tiny little cpu usage because of that before.

[Sparrkle]

I only changed the storyboard binding. so it doesn't matter.

[taooceros]

I only changed the storyboard binding. so it doesn't matter.

basically discussion here #295. (Although I think it is a very trivial cost to have it always animate)

[taooceros]

Sorry I just saw that you use trigger to control the animation. That's a much better solution. Thank you so much.

[jjw24]

@taooceros have you reviewed this and good to merge?

[taooceros]

@taooceros have you reviewed this and good to merge?

sorry I thought I already merged...

[taooceros]

I just give a similar test for that. There's tiny little cpu usage when flow is hide in this pr compared to the current dev branch (only <.5%).

[jjw24]

Hmm, what steps did you do to test it, let me give it a test.

[jjw24]

Also @Sparrkle @taooceros how do I reproduce this error consistently?

[taooceros]

@Sparrkle I add stopStoryBoard when exit the trigger. Could you please take a look on whether I am doing it correctly?

[jjw24]

@taooceros @Sparrkle is this PR still required? Still getting that error?

[taooceros]

@taooceros @Sparrkle is this PR still required? Still getting that error?

It's a better implementation so let's get it in anyway. Though we may need to resolve the conflict