api/ui: datastore: allow to set simple comment

for now forbid all control characters[0] in the comment value, the
section config writer cannot cope with newlines in the value, it
writes them out literally, allowing "injection" or breaking the whole
config.

In the webinterface use also a textfield, not a textarea.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

www/DataStoreConfig.js

@@ -111,8 +111,6 @@ Ext.define('PBS.DataStoreInputPanel', {
     onGetValues: function(values) {
 	var me = this;
 
-	delete values.comment;
-
 	return values;
     },
 
@@ -139,8 +137,7 @@ Ext.define('PBS.DataStoreInputPanel', {
 	{
 	    xtype: 'textfield',
 	    name: 'comment',
-	    emptyText: 'Not yet submitted...',
-	    fieldLabel: gettext('Comment')
+	    fieldLabel: gettext('Comment'),
 	},
     ],
 });