By Anna Ringstrom and Marie Mannes STOCKHOLM (Reuters) -Sweden’s Securitas, which recently bought Stanley Black & Decker’s electronic security division, reported a jump in third-quarter profit on Tuesday on the back of strong sales growth and price increases. Chief Executive Magnus Ahlqvist said demand remained robust in the quarter but warned of global uncertainty, without elaborating further. “We are facing a global environment with increasing uncertainty and we are, as always, continuously working to ensure preparedness and strength also in more challenging times,” he said in a statement. O…