Burberry committed to Hong Kong despite sales slowdown

* Hong Kong comparable sales fall by double digit pct in Q1 * CFO says all Hong Kong stores still profitable * Says watching Chinese stock market turmoil * Shares fall up to 3.7 percent, top FTSE 100 faller (Recasts, adds detail, CFO, analyst comment, shares) By James Davey LONDON, July 15 (Reuters) - Falling sales in Burberry's Hong Kong market will not deter the British luxury brand from its commitment to one of its most profitable regions, it said on Wednesday. Pro-democracy protests in the c