webadmin: Set Incremental Backup to uncheckable when ISO is provided

When a user will try to upload ISO file the Incremental Backup will be
set to false and uncheckable

Bug-Url: https://bugzilla.redhat.com/2120228
Signed-off-by: Artiom Divak <adivak@redhat.com>

frontend/webadmin/modules/uicommonweb/src/main/java/org/ovirt/engine/ui/uicommonweb/models/storage/UploadImageModel.java

@@ -245,6 +245,8 @@ public void initialize() {
             if (imageInfoModel.getContentType() == DiskContentType.ISO) {
                 getDiskModel().getAlias().setEntity(imageInfoModel.getFileName());
                 getDiskModel().getDescription().setEntity(imageInfoModel.getFileName());
+                diskModel.getIsIncrementalBackup().setEntity(false);
+                diskModel.getIsIncrementalBackup().setIsChangeable(false);
             } else {
                 getDiskModel().getAlias().setEntity(null);
                 getDiskModel().getDescription().setEntity(null);