don't do HTML filtering when pasting urls/text/images

fixes
https://anki.tenderapp.com/discussions/ankidesktop/37752-anki-21-wont-play-audio-files-with-a-blank-in-the-title

qt/aqt/editor.py

@@ -1007,7 +1007,7 @@ class EditorWebView(AnkiWebView):
         for fn in types:
             html = fn(mime)
             if html:
-                return html, False
+                return html, True
         return "", False
 
     def _processUrls(self, mime):

qt/ts/src/editor.ts

@@ -405,7 +405,7 @@ let filterHTML = function(html, internal, extendedMode) {
         filterNode(top, extendedMode);
     }
     let outHtml = top.innerHTML;
-    if (!extendedMode) {
+    if (!extendedMode && !internal) {
         // collapse whitespace
         outHtml = outHtml.replace(/[\n\t ]+/g, " ");
     }