correctly display error messages in ObjectGrid

www/manager/data/PVEProxy.js

@@ -18,6 +18,10 @@ Ext.define('PVE.RestProxy', {
 	    reader: {
 		type: 'json',
 		root: 'data'
+	    },
+	    afterRequest: function(request, success) {
+		me.fireEvent('afterload', me, request, success);
+		return;
 	    }
 	});
 

www/manager/dc/OptionView.js

@@ -107,7 +107,7 @@ Ext.define('PVE.dc.OptionView', {
 	});
 
 	Ext.applyIf(me, {
-	    url: "/api2/extjs/cluster/options",
+	    url: "/api2/json/cluster/options",
 	    cwidth1: 130,
 	    interval: 1000,
 	    selModel: sm,

www/manager/grid/ObjectGrid.js

@@ -94,16 +94,23 @@ Ext.define('PVE.grid.ObjectGrid', {
 	    }
 	});
 
-	me.mon(rstore, 'load', function(s, records, success) {
-
+	me.mon(rstore.proxy, 'afterload', function(proxy, request, success) {
 	    load_count++;
-
 	    me.setLoading(false);
 
-	    if (!success) {
-		me.setLoading("Data load error");
+	    if (success) {
 		return;
 	    }
+
+	    var msg;
+	    var operation = request.operation;
+	    var error = operation.getError();
+	    if (error.statusText) {
+		msg = error.statusText + ' (' + error.status + ')';
+	    } else {
+		msg = gettext('Connection error');
+	    }
+	    me.setLoading(msg);
 	});
 
 	Ext.applyIf(me, {

www/manager/node/ServiceView.js

@@ -107,13 +107,31 @@ Ext.define('PVE.node.ServiceView', {
 
 	me.mon(store, 'datachanged', set_button_status);
 
-	me.mon(rstore, 'load', function(s, records, success) {
-	    if (!success) {
-		me.setLoading("Data load error");
+	var load_count = 0;
+
+	me.mon(rstore, 'beforeload', function(s, operation, eOpts) {
+	    if (!load_count) {
+		me.setLoading(true);
+	    }
+	});
+
+	me.mon(rstore.proxy, 'afterload', function(proxy, request, success) {
+	    load_count++;
+	    me.setLoading(false);
+
+	    if (success) {
 		return;
+	    }
+
+	    var msg;
+	    var operation = request.operation;
+	    var error = operation.getError();
+	    if (error.statusText) {
+		msg = error.statusText + ' (' + error.status + ')';
 	    } else {
-		me.setLoading(false);
+		msg = gettext('Connection error');
 	    }
+	    me.setLoading(msg);
 	});
 
 	Ext.apply(me, {