pkluegl opened a new pull request, #174:
URL: https://github.com/apache/uima-ruta/pull/174
**What's in the PR**
- cleanup control and listener when page is created twice
**How to test manually**
* see issue description
**Automatic testing**
* [ ] PR adds/updates unit tests
**Documentation**
* [ ] PR adds/updates documentation
**Organizational**
- [ ] PR includes new dependencies.
<sub><sup>Only dependencies under [approved
licenses](http://www.apache.org/legal/resolved.html#category-a) are allowed.
LICENSE and NOTICE files in the respective modules where dependencies have been
added as well as in the project root have been updated.</sup></sub>
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