Twenty Ten Theme - gallery changes

[anonymized_3085]

With reference to #14791 those changes will produce an ugly 10px wide border in red on focus/hover etc. This patch does fix this, at the expensive of top/bottom margins. This therefore may need an additional patch before it can be applied.

[anonymized_3085]

ref previous ticket #14782

[iammattthomas]

See my comment on #14791; highlighting the linked image borders is great but we shouldn't have to sacrifice the large image border.

Consider that with each of these, we have both an <a> and an <img> that can have borders, backgrounds, and padding; so we've got lots of options for how to style those borders (and which parts to change on hover).

[lancewillett]

Closing as we don't have plans to implement this Twenty Ten enhancement; we're focusing on improving and making newer themes.