V1.99.994 with lots of fixes and edge-case improvements

• v1.99.995 is only a mid version to fix a crash on Firefox
• v1.99.994
  • Marks: fix the mistake that .prefix was enabled by default and matches wrong URLs (breaking)
    • now align with philc/Vimium's in common situations
    • .parent: boolean is added to re-enable the old behavior
  • fix usages of inner clipboard
  • fix conflicts of runKey and the $retry counter
  • LinkHints: add newtab=inactive to always switch back to a current tab, whatever a page script does
  • LinkHints: add .autoChild: boolean | css-selector to click not a hinted element but its topest or matched child
  • editText: add a new action of blank to trigger .$else if a when condition is mismatched
  • focusInput: now try updating its hinting rectangular after focusing
  • fix some small usages
  • fix support for Chrome before version 52
• v1.99.992: fix broken long key sequences in ke mappings
• v1.99.991: fix some UI issues
• v1.99.99: fix broken h and b in visual-caret mode
• v1.99.99: fix support for macbook touchpad
• fix Vimium C hangs in some situations on Chrome 110+
• key mappings: support map! and #if/#else/#endif and even nested pairs
  • use map! and run! to make a mapping work in both normal and plain insert mode
  • support unmap <esc> and unmap <c-[> to disable them in normal mode
  • change how runKey and run rules gets parsed
  • use \\<LF> to merge two lines and strip whitespace prefix characters of a second line
• text substitution: add a inner temporary clipboard and then
  • substitution and runKey mask can read/write it,
  • so that command may create complex runKey task from text in system clipboard easily
• now when <*-modifier> works as a first prefix key, it will end in 3 seconds
  • the key will be passed to web page scripts, to work better with *+Letter
• LinkHints: support more usages including LinkHints.activateOpenUrl
  • LinkHints.activateCopyImage supports .url to copy URL instead
• Vomnibar: de-duplicate tab and history suggestions if possible
  • now also list closed browser window sessions
  • change what's copied on Ctrl+C and Ctrl+Shift+C
• Scroller: fix checks of whether an area should be scrolled or not
• VisualMode: fix the logic of scrolling caret into view
  • Now f and F can open Find bar and then extend selection to a match
• nextTab/.../visitPreviousTab: support blur: boolean | host-matcher-string to grab focus from input again
• focusInput now supports clickable and clickableOnHost
• editText: add when clause to control what to do
• confirm: will show a prompt dialog; parameters are ask: string, $then, minRepeat=1
• fix quite a few edge cases