src: removed query syntax

This change removes the query syntax from the QtSmartSearchbox and all its classes. Now it only autocompletes to one
single Token, but the UI functionality for composing a query of multiple elements is still left for later use. The struct
SearchMatch is now used in the whole pipeline for passing search results back and forth.

src/lib/utility/utility.h

@@ -1,6 +1,7 @@
 #ifndef UTILITY_H
 #define UTILITY_H
 
+#include <deque>
 #include <chrono>
 #include <set>
 
@@ -23,6 +24,9 @@ namespace utility
 	template<typename T>
 	void append(std::set<T>& a, const std::set<T>& b);
 
+	template<typename T>
+	std::vector<T> toVector(const std::deque<T>& d);
+
 	bool intersectionPoint(Vec2f a1, Vec2f b1, Vec2f a2, Vec2f b2, Vec2f* i);
 
 	size_t digits(size_t n);
@@ -49,4 +53,12 @@ void utility::append(std::set<T>& a, const std::set<T>& b)
 	a.insert(b.begin(), b.end());
 }
 
+template<typename T>
+std::vector<T> utility::toVector(const std::deque<T>& d)
+{
+	std::vector<T> v;
+	v.insert(v.begin(), d.begin(), d.end());
+	return v;
+}
+
 #endif // UTILITY_H