chore(window): move popup edit form styles to window

scss/scheduler/_theme.scss

@@ -103,8 +103,5 @@
 @include exports("scheduler-edit-form/theme") {
 
     .k-popup-edit-form {}
-    .k-popup-edit-form .k-edit-buttons {}
-    .k-popup-edit-form .k-edit-buttons .k-button {}
-    .k-popup-edit-form .k-edit-buttons .k-button {}
 
 }

scss/window/_theme.scss

@@ -20,4 +20,15 @@
         background: none;
     }
 
+}
+
+
+
+
+@include exports("popup-edit-form/layout") {
+
+    .k-popup-edit-form .k-edit-buttons {
+        border-color: $modal-header-border-color;
+    }
+
 }