SusiMail: Check mail fixes (ticket #2174)

Fix overlapping error and info boxes
Fix checking mail when apparently connected already
Set soTimeout when fetching mail, now that InternalSocket supports it
Error message and formatting fixes
Debug log tweaks

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 = 9;
+    public final static long BUILD = 10;
 
     /** for example "-test" */
     public final static String EXTRA = "";