ui: add Traffic Control UI

adds a list of traffic control rules (with their current usage)
and let the user add/edit/remove them

the edit window currently has a grid for timeframes to add/remove
with input fields for start/endtime and checkboxes for the days

there are still some improvements possible, like having a seperate
grid for networks (the input field is maybe too small), or
optimizing consecutive days to a range (e.g. mon..wed instead of mon,tue,wed)

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

www/NavigationTree.js

@@ -50,6 +50,12 @@ Ext.define('PBS.store.NavigationStore', {
 			path: 'pbsRemoteView',
 			leaf: true,
 		    },
+		    {
+			text: gettext('Traffic Control'),
+			iconCls: 'fa fa-exchange fa-rotate-90',
+			path: 'pbsTrafficControlView',
+			leaf: true,
+		    },
 		    {
 			text: gettext('Certificates'),
 			iconCls: 'fa fa-certificate',