Add Ext.ux.grid.Search from sencha market
Fix Ext.ux.grid.Search use of RegExp
Drop unneeded quick search controller
Add a filter box plugin extending Ext.ux.grid.Search with defaults (and eventual extensions in the future)
Rename plugin name to gridfilterbox
Replace gridfiltering with gridfilterboxplugin
Merge branch 'rapture' of github.com:sonatype/nexus-oss into rapture

Conflicts:
	plugins/rapture/nexus-rapture-plugin/src/main/resources/static/rapture/NX/app/Application.js