Bug 851457 - [Settings] Enforce correct script direction when Arabic (or...

... any RTL language) is selected

Since markup is not allowed inside <option> tags, the strongly-typed Unicode control characters Left-to-Right Embedding (LRE - U+202A), Right-to-Left Embedding (RLE - U+202B) and Pop Directional Formatting (PDF - U+202C) where used to wrap the language labels.