Feed Thumbnail Preview & RTL Language Support

Hi,
I made some changes to feeds.php and my custom styles to have a preview of each feed (magazine view, like feedly). Also I've added support for both LTR & RTL languages like Persian to the feed view.
The styles is taken from levito's hacky way in http://tt-rss.org/forum/viewtopic.php?f=22&t=2065&start=15#p13509
I'm not familiar with github requests to change source code. correct me if I should do something else to change source codes.


here is my custom styles:
/* allocate some space for the preview image */
.cdm.expandable:not(.active) .cdmHeader {
   min-height: 100px;
}
/* hide content without using display: none */
.cdm.expandable:not(.active) .cdmContent {
   display: block !important;
   height: 0;
   overflow: visible;
}
.cdm.expandable:not(.active) .cdmContent > * {
   position: absolute;
   left: -9999px;
   overflow: visible;

a screenshot of result:
http://tt-rss.org/forum/download/file.php?id=720
forum URL:
http://tt-rss.org/forum/viewtopic.php?f=22&t=3159