Prevent errors from edit link in threads with posting disabled (i.e. archived threads).

src/Posting/QR.coffee

@@ -284,7 +284,6 @@ QR =
   quote: (e) ->
     e?.preventDefault()
     return unless QR.postingIsEnabled
-
     sel  = d.getSelection()
     post = Get.postFromNode @
     text = if post.board.ID is g.BOARD.ID then ">>#{post}\n" else ">>>/#{post.board}/#{post}\n"

src/Posting/QR.oekaki.coffee

@@ -19,6 +19,7 @@ QR.oekaki =
     $.on link, 'click', QR.oekaki.editFile
 
   editFile: ->
+    return unless QR.postingIsEnabled
     post = Get.postFromNode @
     CrossOrigin.file post.file.url, (blob) ->
       QR.openPost()