Header overflow was truncated in MobileFrontend commit 1655d5233 which
added the language switcher button that appears below the title. This no
longer appears to be required even for articles with lengthy titles.
Perhaps because the language switcher button exceeds the page content
margin, it was thought to be necessary.
Bug: T194544
Change-Id: I4e25e7b03df65803cd553b412881eb565ded9b10