Updated The corpora section pages in the Admin Control page.
*Edited the Show Corpora page - Removed the unspported options (user control
 and annotations control).
*Linked the "Install a corpus pre-indexed in CWB" page to the install new
 corpus sidebar button. Now this is the default page which the admin
 can use to upload a new corpus.
*Edited the "Install a corpus pre-indexed in CWB" page - Removed the
 unspported options , and checked the right to left option.
*Edited the "Install new corpus" page - checked the right to left option.