Improve `StatusPollView`

[thai-d-v]

1. use Layout to remove GeometryReader
2. fix inconsistent bars' height
3. move the button image out of the bar to make it clear which bar is selected
4. use relative percent for bars' width
   • more space-efficient, show the relative comparison between bars better
   • the "absolute percent" is already shown by the text on the right
5. refactor code and tweak layout to make it more consistent with other views

[Dimillian]

You became the layout master. What about polls where the text is not fitting? Does it still go on 2 lines? (I think it should be)

[thai-d-v]

I hope this is OK.

[Dimillian]

Nice!