Highlight zone is up of widget

[Liliana99]

Describe the bug
A clear and concise description of what the bug is.

Although I put the padding to slide bubbleShowcase, the highlight zone always is up from widget that I've vinculad with global key!!

To Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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This is an code to RelativeBubbleSlide

As you can see the padding here:

RelativeBubbleSlide(

  widgetKey: key,
  child: RelativeBubbleSlideChild(
    widget: Padding(
      padding: EdgeInsets.only(top: 8.0),
      child: SpeechBubble(
        nipLocation: NipLocation.TOP,
        color: kColorCaption,
        child: Padding(
          padding: EdgeInsets.all(10),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisSize: MainAxisSize.min,
            children: [...]),),)

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
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