Change search input to match text inputs in TinyMCE link modal

[morganestes]

The "Insert/edit link" window fixed by #27305 has the search box styled differently enough from the URL and Title fields as to distract from the nice look of things.

This patch just matches the styling used for the text input so there's consistency in the UI.

Before:

After:

[morganestes]

Changes to /wp-includes/css/editor.css.

[nacin]

Looks like the checkbox is also huge in that screenshot. These fields get big for responsive reasons. I can only reproduce it with a narrow-ish window. The fact that the other text inputs aren't growing may actually be the issue.

[iseulde]

Related: #26952

[iseulde]

Replying to nacin:

The fact that the other text inputs aren't growing may actually be the issue.

Yes. :)

[iseulde]

I've uploaded a patch on the related ticket above that takes care of all these issues.

[SergeyBiryukov]

Duplicate of #26952.

[morganestes]

Dang, my search-fu is off. I looked for other tickets before opening this one, promise I did!