Added CompositView, which implements both View and ViewLayout, for combining Views to one Widget. The layout can be set
to either horizontal or vertical. SearchView, RefreshView and UndoRedoView are combined to one DockWidget by the
ComponentManager now.
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This change adds the refresh component that allows for refreshing the source code via UI or shortcut. If automatic
refreshing is activated via the UI, the code is refreshed anytime the window gets focus. The contents of all the
updated source files get removed from Storage, before reparsing them. File dependencies are not respected yet.
Eberhard Graether