New ECA rule re-generation limitation

1. Add the migration plugin with GBP tooling environment. Once done, there will be a new item in context menu of BTT project in project explorer named "Migrate BTT Project" as following. Click on it will mark all XUI files "ruleDirty" to true inside the project.

2. After that, click build project will trigger fully build for the whole project, all ECA JS files should be generated again.