Fixed suggestions list scrolling and sizing

[KaYBlitZ]

Spent a better part of the day fixing the suggestions list scrolling and resizing.

The list resizes now by setting a fixed height. The fixed height is changed whenever the keyboard is toggled on/off and then calling a rebuild. This means the list will resize to just above the keyboard or use up the entire screen.

Please edit as you see fit.

Great plugin!

[AbdulRahmanAlHamali]

I didn't understand the purpose of this

[KaYBlitZ]

That code just adds a callback to be executed after the frame. Originally the code used

     while (renderBox == null) {	
       await Future.delayed(Duration(milliseconds: 10));	
 
        renderBox = context.findRenderObject();	
     }	
 
      while (!renderBox.hasSize) {	
       await Future.delayed(Duration(milliseconds: 10));	
     }

By waiting until after the frame, renderBox will be ready and we do not need to loop and wait.

That addPostFrameCallback line and removing the above code does not have an impact on the suggestions list sizing and scrolling.

I added it in because it made the code cleaner. It doesn't have an impact on performance either way. The callback is only called once as well, so it works well for its purpose.

[AbdulRahmanAlHamali]

Ohh interesting! thank you!

[AbdulRahmanAlHamali]

@KaYBlitZ Thank you for the pull request! It looks really neat, and the amount of effort is obvious!

I have reviewed your pull request and it looks very good overall, I will test it tonight, or by the weekend at max, and will release a new version with your contribution asap.

Thank you again!