SusiMail: Send deletions after connect so emails don't come back after a move (ticket #2087)

Refactor/consolidate pop3 deletion code
Fix loading mails in checker
Fix checker thread name
Return to inbox, not drafts, after sending draft
CSS for select

router/java/src/net/i2p/router/RouterVersion.java

@@ -18,7 +18,7 @@ public class RouterVersion {
     /** deprecated */
     public final static String ID = "Monotone";
     public final static String VERSION = CoreVersion.VERSION;
-    public final static long BUILD = 14;
+    public final static long BUILD = 15;
 
     /** for example "-test" */
     public final static String EXTRA = "";