By Susan Mathew and Anisha Sircar (Reuters) – European shares edged higher on Tuesday as investors awaited a batch of fresh sanctions on Moscow, while France’s blue-chip index slumped after opinion polls for presidential elections due later this month tightened. French markets woke up to the risk of far-right candidate Marine Le Pen winning this month’s elections against Emmanuel Macron after Le Pen captured 48.5% of voter intentions in a poll on Monday – the highest she has ever notched. The pan-European STOXX 600 index was up 0.2%, paring back some gains made earlier in the day, while France…