Update 2.10 release notes

Change-Id: I686ee169aebb42ff649c2ffa27cf0a58af1949c3

ReleaseNotes/ReleaseNotes-2.10.txt

diff --git a/ReleaseNotes/ReleaseNotes-2.10.txt b/ReleaseNotes/ReleaseNotes-2.10.txt
index 10eef4b..8e428d9 100644
--- a/ReleaseNotes/ReleaseNotes-2.10.txt
+++ b/ReleaseNotes/ReleaseNotes-2.10.txt
@@ -490,6 +490,11 @@
 good, we only treat dots and commas as being part of urls, if they are
 neither followed by whitespace nor occur at the end of a string.
 
+* Re-enable the 'Cherry Pick' button after canceling the dialog.
++
+If the dialog was canceled, the button remained disabled and could not be
+used again.
+
 * Improve message when removing a reviewer.
 
 * link:http://code.google.com/p/gerrit/issues/detail?id=527[Issue 527]: