ui: fixed some ui related bugs

* aggregation edges only connect toplevel nodes
* fixed aggregation click for undo and redo
* don't show edge name in search field, because they are not searchable
* clear search field when clicking aggregation
* leave active nodes active when clicking edges

src/lib/utility/messaging/type/MessageActivateEdge.h

@@ -22,6 +22,11 @@ public:
 		return "MessageActivateEdge";
 	}
 
+	bool isAggregation() const
+	{
+		return type == Edge::EDGE_AGGREGATION;
+	}
+
 	const Id tokenId;
 	const Edge::EdgeType type;
 	const std::string name;

src/lib/utility/messaging/type/MessageActivateTokens.h

@@ -10,6 +10,7 @@ public:
 	MessageActivateTokens(const std::vector<Id>& tokenIds)
 		: tokenIds(tokenIds)
 		, isEdge(false)
+		, isAggregation(false)
 		, isFromSystem(false)
 	{
 	}
@@ -17,6 +18,7 @@ public:
 	MessageActivateTokens(Id tokenId)
 		: tokenIds(1, tokenId)
 		, isEdge(false)
+		, isAggregation(false)
 		, isFromSystem(false)
 	{
 	}
@@ -29,6 +31,7 @@ public:
 	const std::vector<Id> tokenIds;
 
 	bool isEdge;
+	bool isAggregation;
 	bool isFromSystem;
 };
 

src/lib/utility/utility.h

@@ -31,7 +31,7 @@ namespace utility
 template<typename T>
 std::vector<T> utility::concat(const std::vector<T>& a, const std::vector<T>& b)
 {
-	std::vector<T> r(a.size() + b.size());
+	std::vector<T> r;
 	append(r, a);
 	append(r, b);
 	return r;