validation textbox: invalid text equivalent should be larger

[Becky Gibson]

In high contrast mode It is really hard to see the text equivalent (x) for the invalid icon in the validation textbox, it really should be close to the same size as the font (perhaps .75em)

[bill]

FYI, may be affected by #7332.

[Becky Gibson]

Needs to be retested, but can move to 1.4

[Becky Gibson]

(In [16358]) fixes #7577 increase font size to make the text equivalent for error icon bigger, decrease line height so input field ends up staying the same height.

[bill]

Hmm, I'm surprised that line-height makes any difference since the element is float:right. I had hoped we wouldn't need line-height or a font setting on the validation icon at all, but I guess that float:right complicates things, since the icon has the chance of being cut off?