Merge pull request #42007 from nextcloud/fix/2f-ui

fix: inconsistencies in the shared two-factor UI

core/css/guest.scss

@@ -424,8 +424,9 @@ form .warning input[type='checkbox']+label {
 }
 
 .body-login-container.two-factor {
-	max-width: 290px;
-	margin: 15px auto 0;
+	// Same size as login box and dashboard panels
+	width: 320px;
+	box-sizing: border-box;
 }
 .two-factor-provider {
 	display: flex;