ui: integrated autocompletion and filtering into SearchView

- QtSearchView was split into QtSearchView and QtSearchBox.
- QtSearchBox contains all Qt elements and can use them purely
- QtSearchView forwards calls from the SearchController to QtSearchBox
- Searching is initiated with MessageSearch to the SearchController
- Autocompletion is initiated with MessageSearchAutocomplete to the SearchController
- The search field is able to create filter queries by only giving autocompletions for the last token in the query
- For named tokens the search field adds their token ids to the query in the form of "A,25" for faster lookup

bug id = #21

src/lib/component/view/SearchView.h

@@ -2,6 +2,7 @@
 #define SEARCH_VIEW_H
 
 #include "component/view/View.h"
+#include "data/SearchIndex.h"
 
 class SearchController;
 
@@ -15,7 +16,7 @@ public:
 
 	virtual void setText(const std::string& s) = 0;
 	virtual void setFocus() = 0;
-	virtual void setAutocompletionList(const std::vector<std::string>& autocompletionList) = 0;
+	virtual void setAutocompletionList(const std::vector<SearchIndex::SearchMatch>& autocompletionList) = 0;
 
 protected:
 	SearchController* getController();

src/lib/component/view/View.h

@@ -20,6 +20,7 @@ public:
 	virtual ~View();
 
 	virtual std::string getName() const = 0;
+
 	virtual void createWidgetWrapper() = 0;
 	virtual void initView() = 0;
 	virtual void refreshView() = 0;