* fixed aggregation layout within group
* fixed moving of group did not resize view
* fixed edges behind group could not be hovered
* fixed overlapping lines in sublayout
* fixed use of correct column width in sublayout
* extend horizontal edges to origin column width
* leave horizontal gap in the middle of the left and right buckets for routing edges
* move left and right buckets vertically so that edges enter and leave horizontally
* removed third pivoting for graph edges, all edges enter and leave relative to the node center now
* added buttons to enable grouping by file or namespace
* last used group settings saved to ApplicationSettings
* made groups hoverable/clickable on label only
* improved node hatching and override edge colors
* group overview lists
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* overview bundles imitate style of bundled node type
* removed bundle for built-in types
* show contents of overview bundle in vertical list layouted with new ListLayouter
* nodes starting with the same letter are grouped with the letter displayed above
* pressing the letter key will scroll to the group
* also use this list layouting for namespace & package contents
* renamed BucketGrid to BucketLayouter
* moved used functions of GraphPostProcessor to GraphViewStyle and removed GraphPostProcessor
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Eberhard Graether