A landlord-interest group looking to change Hoboken’s rent control law via a referendum was given another lifeline when it was granted an extra week to garner enough valid signatures to place the question on the ballot. The deadline to “cure” the signatures petition previously submitted by the Mile Square Taxpayers Association (MSTA) to launch the referendum has been extended to June 17, MSTA Executive Director Ron Simoncini told The Jersey Journal Monday, which was the original deadline. “We appreciate the fact (that) the clerk has provided us with extra time and we’ll be (resubmitting) withi…