Issue #173: Potential memory leak in Annotation Browser View

[pkluegl]

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. _{^{Only dependencies under approved licenses 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.}}

[nadre]

Observation: I just opened a lot (>200) of different XMIs and didn't observe any memory issues. These XMIs all had something in common: Simple features. Maybe the error relies in opening XMIs with complex features.