ui: redesigned graph overview and use new list layouting within overview bundles

* 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

fortune cookie message = Don't be afraid to take that big step

src/lib/CMakeLists.txt

@@ -2,12 +2,12 @@
 add_files(
 	LIB_FILES
 
-	component/controller/helper/BucketGrid.cpp
-	component/controller/helper/BucketGrid.h
+	component/controller/helper/BucketLayouter.cpp
+	component/controller/helper/BucketLayouter.h
 	component/controller/helper/DummyEdge.h
 	component/controller/helper/DummyNode.h
-	component/controller/helper/GraphPostprocessor.cpp
-	component/controller/helper/GraphPostprocessor.h
+	component/controller/helper/ListLayouter.cpp
+	component/controller/helper/ListLayouter.h
 	component/controller/helper/NetworkProtocolHelper.cpp
 	component/controller/helper/NetworkProtocolHelper.h
 	component/controller/helper/SnippetMerger.cpp
@@ -362,7 +362,7 @@ add_files(
 
 	utility/text/TextAccess.cpp
 	utility/text/TextAccess.h
-	
+
 	utility/ApplicationArchitectureType.h
 	utility/AppPath.cpp
 	utility/AppPath.h