Dynamic: Add DynamicContentIncludePage to allow including pages

dynamic/dynamiccontentpostlist.h

@@ -4,12 +4,8 @@
 #include "dynamiccontent.h"
 class DynamicContentPostList : public DynamicContent
 {
-  private:
-	std::string catname;
-
   public:
 	using DynamicContent::DynamicContent;
-	void setCategory(std::string catname);
 	std::string render() override;
 };