[ar] Increment line height on titles for Arabic language
Merge pull request #2610 from mermi/bug-FixeAllTtilesForArabicLang

[ar] Increment line height on titles for Arabic language
Bug 1115066 - Thunderbird start page: add redirects for locales

Locales: ca, cs, de, fr, fy-NL, gd, hr, hy-AM, nl, sk, sl, sq, uk, zh-TW.