Make Maniphest emails align title numbers better and fix a transaction

aggregation bug.

Summary:
Transactions always aggregated even when separated by large time
differences becuase of some clown typoing; fix that. Also make the subject
lines for tasks align better in the inbox.

Test Plan:
I'm feeling lucky.

Differential Revision: 29
Reviewed By: tomo
Reviewers: tomo

src/applications/maniphest/editor/transaction/ManiphestTransactionEditor.php

@@ -154,7 +154,7 @@ class ManiphestTransactionEditor {
 
     id(new PhabricatorMetaMTAMail())
       ->setSubject(
-        '[Maniphest] '.$action.': T'.$task->getID().' '.$task->getTitle())
+        '[Maniphest] T'.$task->getID().' '.$action.':  '.$task->getTitle())
       ->setFrom($transaction->getAuthorPHID())
       ->addTos($email_to)
       ->addCCs($email_cc)

src/applications/maniphest/storage/transaction/ManiphestTransaction.php

@@ -66,7 +66,7 @@ class ManiphestTransaction extends ManiphestDAO {
       return false;
     }
     $ttime = $target->getDateCreated();
-    $stime = $target->getDateCreated();
+    $stime = $this->getDateCreated();
     if (abs($stime - $ttime) > 60) {
       return false;
     }