ui: tfa: specify which confirmation password is required

Clarify that the password of the user one wants to add TFA too is
required, which is not necessarily the one of the current logged in
user. Use an empty text for that.

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

www/window/AddTfaRecovery.js

@@ -34,6 +34,13 @@ Ext.define('PBS.window.AddTfaRecovery', {
     viewModel: {
 	data: {
 	    has_entry: false,
+	    userid: Proxmox.UserName,
+	},
+	formulas: {
+	    passwordConfirmText: (get) => {
+		let id = get('userid');
+		return Ext.String.format(gettext("Confirm password of '{0}'"), id);
+	    },
 	},
     },
 
@@ -60,11 +67,13 @@ Ext.define('PBS.window.AddTfaRecovery', {
 
 	onUseridChange: async function(field, userid) {
 	    let me = this;
+	    let vm = me.getViewModel();
 
 	    me.userid = userid;
+	    vm.set('userid', userid);
 
 	    let has_entry = await me.hasEntry(userid);
-	    me.getViewModel().set('has_entry', has_entry);
+	    vm.set('has_entry', has_entry);
 	},
     },
 
@@ -114,7 +123,9 @@ Ext.define('PBS.window.AddTfaRecovery', {
 	    validateBlank: true,
 	    hidden: Proxmox.UserName === 'root@pam',
 	    disabled: Proxmox.UserName === 'root@pam',
-	    emptyText: gettext('verify current password'),
+	    bind: {
+		emptyText: '{passwordConfirmText}',
+	    },
 	},
     ],
 });