BHV-1187: Check first character of MarqueeItem to determine RTL mode.

Issue
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There can be a mixture of text from languages that have different direction properties (rtl, ltr) within a given view, which can result in text marqueeing in the wrong direction.

Fix
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In `MarqueeItem`, we check the first character of the content and see if it is within a known range of RTL languages we are supporting, setting the RTL mode as necessary.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>