selection issue fix

[leoarc]

If the region selected for prediction is smaller than the input size requirement of the model , the page got stuck at :

And there's a corresponding memory leak :

Fixed this and added an alert to tell user to select a larger section . But I cannot understand why self.close( ) is not working for closing the modelpanel

Please review @Insiyaa @birm

[Insiyaa]

Thanks for fixing this redundant computation!
self.close() is working, due to this line it remains open. A temporary fix maybe to put some timeout before self.close() :p.
@birm might have some better suggestions.

[birm]

ModelPanel.prototype.open is an async function, so it returns a promise, so you could use .then to call something after it's finished.

[leoarc]

@birm @Insiyaa I know this is not a clean way but does this look good to you ? ( Also sorry for so many commits , I messed up trying to resolve conflicts)

[birm]

We'll squash on merge :)