re-hide thread selector in threads (now optionally)

src/General/Config.coffee

@@ -315,6 +315,10 @@ Config =
         false
         'Remember the spoiler state, instead of resetting after posting.'
       ]
+      'Show New Thread Option in Threads': [
+        false
+        'Show the option to post a new thread from inside a thread.'
+      ]
       'Show Name and Subject': [
         false
         'Show the classic name, email, and subject fields in the QR, even when 4chan doesn\'t use them all.'

src/General/css/style.css

@@ -809,6 +809,7 @@ span.hide-announcement {
 :root.hide-original-post-form #togglePostFormLink,
 :root:not(.catalog) #togglePostFormLink,
 #qr.autohide:not(.focus):not(:hover):not(:active) > form,
+:root.thread-view #qr select[data-name=thread],
 #file-n-submit:not(.has-file) #qr-filerm {
   display: none;
 }

src/Posting/QR.coffee

@@ -469,6 +469,9 @@ QR =
     QR.max_width_video = QR.max_height_video = 2048
     QR.max_duration_video = 120
 
+    if Conf['Show New Thread Option in Threads']
+      $.addClass QR.nodes.el, 'show-new-thread-option'
+
     if Conf['Show Name and Subject']
       $.addClass QR.nodes.name, 'force-show'
       $.addClass QR.nodes.sub, 'force-show'