rework focusOrLaunch: change logic and fix a typo
rework focusOrLaunch: change logic and fix a typo

if no same-url tab is in the same incognito status, then open a new tab,
  instead of reusing one same-url tab.
fix a typo that Marks.gotoTab is called without arg "tab"

gdh1995/vimium-plus,gdh1995/vimium-plus,gdh1995/vimium-plus