Twenty Thirteen: Increase comment form label widths

[obenland]

In languages other than English, the comment form labels might be longer than 100px. Let's increase the width here and also be a bit more specific about which labels we mean exactly.

[lancewillett]

The width change is probably OK, but I don't agree with more specific selectors.

See ​http://core.trac.wordpress.org/ticket/23702#comment:3 and r23690 -- we went more general on purpose.

[obenland]

Replying to lancewillett:

I don't agree with more specific selectors.

See ​http://core.trac.wordpress.org/ticket/23702#comment:3 and r23690 -- we went more general on purpose.

I changed my mind :)

With more specific selectors we avoid stomping all over labels that are injected by plugins. Like Jetpacks subscribe to comments or captcha plugins.

[lancewillett]

.1 adds similar spacing for comment label, and also RTL support.

[lancewillett]

In 23967:

Twenty Thirteen: improve comment label selectors and nudge up their width a bit to account for non-English installs. Props obenland for initial patch, fixes #24039.