Revert iteration changes

This broke parsing embedded parts.

Revert "Keep the typos coming"
This reverts commit 39c27c4.

Revert "Fix typo"
This reverts commit 6a2f78a.

Revert "Fix iteration through certain MIME parts with deeply embedded subparts"
This reverts commit cd41ccc.

This has been tracked down to a very obscure issue in the new MIME part
iteration code.

imp/lib/Contents/Message.php

@@ -561,16 +561,10 @@ protected function _getInlineOutput(array $options)
             : null;
         $show_parts = $prefs->getValue('parts_display');
 
-        /* Need to iterate through entire part list first, since render
-         * methods may break iteration when they iterate through subparts. */
-        $p_list = array();
-        foreach ($this->contents->getMIMEMessage()->partIterator() as $val) {
-            $mime_id = $val->getMimeId();
+        foreach ($this->contents->getMIMEMessage()->partIterator() as $part) {
+            $mime_id = $part->getMimeId();
             $i[] = $mime_id;
-            $p_list[$mime_id] = $val;
-        }
 
-        foreach ($p_list as $mime_id => $part) {
             if (isset($display_ids[$mime_id]) ||
                 isset($atc_parts[$mime_id])) {
                 continue;