Update: So far I found class ListEditor which provides the functionality I'm searching for except the 'edit' button and only for one column.
The 'Proxy bypass' Page extends directly from PreferencePage. So there is no proper Base Class I could use.
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The standard PDE way of adding Preference is to use field editors (for Boolean, String, Integer..) and subclass FieldEditorPreferencePage.
I'd like to integrate a list similar to the 'Network Connections' List in Preferences.
Is there a Standard List Class with Add/Edit/Remove Button I could use or is extending the PreferencePage and do all loading/saving manually the way to go?
the m2Eclipse Plugin also has a List
it uses TemplatePreferencePage, which has too much functionality