ui: tape: add Edit Windows

includes edit windows for
* Drives
* Changers
* Media Pools
* Labeling Media
* Making new Tape Backups

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

www/tape/window/ChangerEdit.js

@@ -0,0 +1,50 @@
+Ext.define('PBS.TapeManagement.ChangerEditWindow', {
+    extend: 'Proxmox.window.Edit',
+    alias: 'widget.pbsChangerEditWindow',
+    mixins: ['Proxmox.Mixin.CBind'],
+
+    isCreate: true,
+    isAdd: true,
+    subject: gettext('Changer'),
+    cbindData: function(initialConfig) {
+	let me = this;
+
+	let changerid = initialConfig.changerid;
+	let baseurl = '/api2/extjs/config/changer';
+
+	me.isCreate = !changerid;
+	me.url = changerid ? `${baseurl}/${encodeURIComponent(changerid)}` : baseurl;
+	me.method = changerid ? 'PUT' : 'POST';
+
+	return { };
+    },
+
+    items: [
+	{
+	    fieldLabel: gettext('Name'),
+	    name: 'name',
+	    xtype: 'pmxDisplayEditField',
+	    renderer: Ext.htmlEncode,
+	    allowBlank: false,
+	    cbind: {
+		editable: '{isCreate}',
+	    },
+	},
+	{
+	    fieldLabel: gettext('Path'),
+	    xtype: 'pbsTapeDevicePathSelector',
+	    type: 'changers',
+	    name: 'path',
+	    allowBlank: false,
+	},
+	{
+	    fieldLabel: gettext('Import-Export Slots'),
+	    xtype: 'proxmoxtextfield',
+	    name: 'export-slots',
+	    cbind: {
+		deleteEmpty: '{!isCreate}',
+	    },
+	},
+    ],
+});
+