Table caption's padding should be set to the same values as td's and th's value

Created by: doekman

In the file _tables.scss within bootstrap, the padding properties of the td and th element are set to some value.

However, when creating a table with a caption-element, the layout is not "nice". In the annotated screenshot, the caption's text is left aligned to the red line. It would be nice it it was default aligned to the blue line, as is demonstrated by the second table in which both items are aligned by a green line.

It would be great if this would be standard out of the box behaviour.

Test-html, screenshot and annotated screenshot attached here