* Add spread/pinch gesture to gesture manager ability to disable: https://www.mobileread.com/forums/showthread.php?t=321818 https://github.com/koreader/koreader/pull/4815#issuecomment-478462416 * Add increase/decrease font size action gesture https://github.com/koreader/koreader/issues/4727#issuecomment-475950484