backup: allow to select compression (lzo/gzip)

www/manager/Makefile

@@ -23,6 +23,7 @@ JSSRC= 				                 	\
 	form/ComboGrid.js				\
 	form/KVComboBox.js				\
 	form/Boolean.js					\
+	form/CompressionSelector.js			\
 	form/PoolSelector.js				\
 	form/GroupSelector.js				\
 	form/UserSelector.js				\

www/manager/dc/Backup.js

@@ -159,11 +159,10 @@ Ext.define('PVE.dc.BackupEdit', {
 		name: 'mailto'
 	    },
 	    {
-		xtype: 'pvecheckbox',
+		xtype: 'pveCompressionSelector',
 		fieldLabel: gettext('Compression'),
 		name: 'compress',
-		checked: true,
-		uncheckedValue: 0
+		value: me.create ? 'lzo' : ''
 	    },
 	    {
 		xtype: 'numberfield',

www/manager/form/CompressionSelector.js

+Ext.define('PVE.form.CompressionSelector', {
+    extend: 'PVE.form.KVComboBox',
+    alias: ['widget.pveCompressionSelector'],
+  
+    initComponent: function() {
+	var me = this;
+
+        me.data = [ 
+	    ['', 'none'],
+	    ['lzo', 'LZO (fast)'],
+	    ['gzip', 'GZIP (good)'],
+	];
+
+	me.callParent();
+    }
+});