• fix bugs in key mappings
• fix broken goNext when there's no noRel=true
• fix Vomnibar may flicker during initing
• fix Vimium C might break sandboxed about:blank iframes
• work around a Firefox bug that no key can be "repeated" in Wayland mode
• rewrite Marks to support iframes better, and add some parameters
  • now number keys are treated as temporary marks by default; use storeCount to save them into disk
• some other small logic changes