NetworkView: add apply config button

when the host has ifupdown2 installed, we can hot apply the config
add a button to do this

if the user does not meet the requirements, the api call
will show why and throw an error (without changing anything)

the button has to be enabled via 'showApplyBtn', because for now,
we do not want it for pmg

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

node/NetworkView.js

@@ -20,6 +20,8 @@ Ext.define('Proxmox.node.NetworkView', {
     // order is always the same
     types: ['bridge', 'bond', 'ovs'],
 
+    showApplyBtn: false,
+
     initComponent : function() {
 	var me = this;
 
@@ -45,6 +47,7 @@ Ext.define('Proxmox.node.NetworkView', {
 
 	var reload = function() {
 	    var changeitem = me.down('#changes');
+	    var apply_btn = me.down('#apply');
 	    Proxmox.Utils.API2Request({
 		url: baseUrl,
 		failure: function(response, opts) {
@@ -60,9 +63,11 @@ Ext.define('Proxmox.node.NetworkView', {
 		    if (changes === undefined || changes === '') {
 			changes = gettext("No changes");
 			changeitem.setHidden(true);
+			apply_btn.setDisabled(true);
 		    } else {
 			changeitem.update("<pre>" + Ext.htmlEncode(changes) + "</pre>");
 			changeitem.setHidden(false);
+			apply_btn.setDisabled(false);
 		    }
 		}
 	    });
@@ -118,6 +123,32 @@ Ext.define('Proxmox.node.NetworkView', {
 	    }
 	});
 
+	var apply_btn = Ext.create('Proxmox.button.Button', {
+	    text: gettext('Apply Configuration'),
+	    itemId: 'apply',
+	    disabled: true,
+	    hidden: !me.showApplyBtn,
+	    handler: function() {
+		Proxmox.Utils.API2Request({
+		    url: baseUrl,
+		    method: 'PUT',
+		    waitMsgTarget: me,
+		    success: function(response, opts) {
+			var upid = response.result.data;
+
+			var win = Ext.create('Proxmox.window.TaskProgress', {
+			    taskDone: reload,
+			    upid: upid
+			});
+			win.show();
+		    },
+		    failure: function(response, opts) {
+			Ext.Msg.alert(gettext('Error'), response.htmlStatus);
+		    }
+		});
+	    }
+	});
+
 	var set_button_status = function() {
 	    var grid = me.down('gridpanel');
 	    var sm = grid.getSelectionModel();
@@ -265,7 +296,9 @@ Ext.define('Proxmox.node.NetworkView', {
 		    }
 		},
 		edit_btn,
-		del_btn
+		del_btn,
+		' ',
+		apply_btn
 	    ],
 	    items: [
 		{
@@ -383,7 +416,7 @@ Ext.define('Proxmox.node.NetworkView', {
 		    itemId: 'changes',
 		    tbar: [
 			gettext('Pending changes') + ' (' +
-			    gettext('Please reboot to activate changes') + ')'
+			    gettext('Please reboot or apply to activate changes') + ')'
 		    ],
 		    split: true,
 		    bodyPadding: 5,