Make "My Drafts" limited to own drafts

The query "is:draft" also returns other users' drafts if the current
user has the "View Drafts" capability.

Limit it to the user's own changes by adding the "owner:self" clause.

Change-Id: Ib144e447687ae1d6fd99d34e108abb8a2f79e606

gerrit-gwtui/src/main/java/com/google/gerrit/client/Dispatcher.java

@@ -284,7 +284,7 @@ public class Dispatcher {
     }
 
     if (matchExact("mine,drafts", token)) {
-      return toChangeQuery("is:draft");
+      return toChangeQuery("owner:self is:draft");
     }
 
     if (matchExact("mine,comments", token)) {