(again)

https://github.com/twbs/bootlint/wiki/W007

Fixes #27114

Blockquote footer font size is currently hardcoded to 80%, implying (in a comment) that this would result in the default font size. However, since the blockquote font size itself is variable, this is not necessarily true, and 80% of anything actually results in an arbitrary font size.

80% as a default is still fine.

This isn't needed, because it's not supposed to be seen normally, with JavaScript enabled.

Specify new height for inputs in floating label example after v4.1.3's addition of a fixed height property on .form-control

Matches the method used for the modal header. Fixes #26955.