Memory leaks

As reported by Jörg, using the following steps (and without assigning additional memory), the heap space runs out of memory:

However, now, when I try to complete the whole demo, I run into a OutOfMemoryError (see below). Here is the way to consistently reproduce the error:

Run TouchCORE, load FCBank_ready_for_demo

Open GUI feature, reuse “Observer” (select push), use “mapping view” to map Subject to Account, modify to withdraw, Observer to AccountWindow, update to refreshWindow

Save GUI, go back to concern

Open Transfer feature, reuse “Security/Authentication”, select AccessBlocking, AutoLogout, Password, PasswordExpiry

Use “mapping view” to map Authenticatable to User, ProtectedClass to AccountManager, ProtectedMethod to Transfer

Save Transfer, go back to concern

Reopen Transfer, click WeaveAll

Exception in thread "Animation Thread" java.lang.OutOfMemoryError: Java heap space

I profiled the app using JProfiler and there seem to be many memory leaks. The ones I could identify are the following:

When closing an aspect scene, only the current view (since it is a child of the scene) is destroyed. However, there are several views (e.g., state views, message view container and any message view that was opened) that are currently not displayed and therefore not destroyed.
When removing an instantiation, the hidden container and buttons are not destroyed.
Whenever the feature model changes, it is replotted. Here, all children are removed and new ones created. I.e., a FeatureView is removed and a new one instantiated. However, removing it from the parent does not destroy it.
In DisplayConcernScene a listener is registered for each feature and the feature model. However, when the scene is destroyed, the listener is not removed.

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