Implement 'Use Recaptcha v2 in Reports' option.

src/General/Config.coffee

@@ -396,7 +396,7 @@ Config =
         'Label each post from a new IP with the thread\'s current IP count.'
       ]
 
-    'Posting':
+    'Posting and Captchas':
       'Quick Reply': [
         true
         'All-in-one form to reply, create threads, automate dumping and more.'
@@ -485,6 +485,10 @@ Config =
         true
         'Make captcha easier to use, especially with the keyboard.'
       ]
+      'Use Recaptcha v2 in Reports': [
+        false
+        'Use the image selection captcha in the report window.'
+      ]
 
     'Quote Links':
       'Quote Backlinks': [

src/Miscellaneous/Report.coffee

@@ -10,7 +10,9 @@ Report =
   ready: ->
     $.addStyle Report.css
     Report.archive() if Conf['Archive Report']
-    if $.hasClass doc, 'js-enabled'
+    if Conf['Use Recaptcha v2 in Reports']
+      Report.captchaV2()
+    if Conf['Use Recaptcha v2 in Reports'] and $.hasClass doc, 'js-enabled'
       new MutationObserver(-> Report.fit '.gc-bubbleDefault').observe d.body,
         childList:  true
         attributes: true
@@ -18,6 +20,19 @@ Report =
     else
       Report.fit 'body'
 
+  captchaV2: ->
+    return unless old = $.id 'captchaContainerAlt'
+    container = $.el 'div',
+      className: 'g-recaptcha'
+    container.dataset.sitekey = '<%= meta.recaptchaKey %>'
+    $.replace old, container
+    url = 'https://www.google.com/recaptcha/api.js'
+    if lang = Conf['captchaLanguage'].trim()
+      url += "?hl=#{encodeURIComponent lang}"
+    script = $.el 'script',
+      src: url
+    $.add d.head, script
+
   fit: (selector) ->
     return unless el = $ selector, doc
     dy = el.getBoundingClientRect().bottom - doc.clientHeight + 8