Twenty Ten Theme - skip link CSS fixes

[elfin]

Having a skip link is good, not showing it when tabbing through the page is bad. These minor tweaks fix this and display it 'over' the header image.

from #14782

Oh and ideally it shouldn't be called screen-reader-text as it is inaccurate. Sighted people who navigate using a keyboard find it useful as well.

I like the idea here, but the styling isn't great -- no background, white text, full-width of the page, makes the link difficult to read, depending on the header image. Should be Helvetica to match the text in the menu, too.

can you confirm which browser you used? the skip link background was supposed to be restricted to the same width as the the horizontal menu.

I won't correct this one as #14798 supercedes it.