Fix wrapping when converting HTML to plain text.

There is no 'wrap' parameter in the Html2text Filter, we have to set the width
to 0 instead. This broke flowed text wrapping of text/plain alternative parts
in any HTML messages sent by IMP.

imp/lib/Compose.php

@@ -1466,7 +1466,7 @@ protected function _createMimeMessage(
                 $body_html->returnHtml(),
                 'Html2text',
                 array(
-                    'wrap' => false
+                    'width' => 0
                 )
             );
         }

imp/lib/Compose/Ui.php

@@ -184,7 +184,7 @@ public function convertComposeText($data, $to)
 
         case 'text':
             return $GLOBALS['injector']->getInstance('Horde_Core_Factory_TextFilter')->filter($data, 'Html2text', array(
-                'wrap' => false
+                'width' => 0
             ));
         }
     }

imp/lib/Mime/Viewer/Html.php

@@ -206,7 +206,7 @@ protected function _IMPrender($inline)
          * text. */
         if ($convert_text) {
             $data = $this->_textFilter($data, 'Html2text', array(
-                'wrap' => false
+                'width' => 0
             ));
 
             // Filter bad language.