Dvr: renamed dvrall and dvrallcfg to dvrcfg
Webui: revised permissions
Webui: cleanup and fixed some extensions loading
Webui: cleanup ext images and ext.css
Webui: renamed some files
Webui: removed older multiselect extension
Webui: revised acl grid
Webui: minified ext.css
Webui: replaced Ext.grid.RowSelectionModel with Ext.grid.CheckboxSelectionModel
Webui: replaced deprecated Ext.FormPanel with Ext.form.FormPanel
Webui: revised channels grid
Webui: renamed delete buttons text
Webui: improved ComboBox through lazyRender
Webui: renamed delete buttons text
Webui: bunch of fixes