Add message list search feature

- Search as you type (client side)
- Add makeDelay to reduce resize and search callback frequency
- Rename class listEntry to message-list-entry
- Move Refresh button into search button bar

CHANGELOG.md

@@ -3,9 +3,12 @@ All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
+### Added
+- Message Cap to status page
+- Search-while-you-type message list filter
+
 ### Fixed
 - Shutdown hang in retention scanner
-- Add Message Cap to status page
 
 ## [1.1.0-rc1] - 2016-03-04
 ### Added