sort languages by display value

Change-Id: I79d58fd680dd04161b89d42fed04a86a931defd3
Signed-off-by: Xuefer <xuefer@gmail.com>

gui/pages.cpp

@@ -36,6 +36,7 @@
 #include "../partitions.hpp"
 
 #include <string>
+#include <algorithm>
 
 extern "C" {
 #include "../twcommon.h"
@@ -1333,6 +1334,8 @@ void PageManager::LoadLanguageList(ZipArchive* package) {
 	} else {
 		LoadLanguageListDir(TWRES "languages/");
 	}
+
+	std::sort(Language_List.begin(), Language_List.end());
 }
 
 void PageManager::LoadLanguage(string filename) {

gui/pages.hpp

@@ -34,6 +34,11 @@ struct language_struct {
 	std::string displayvalue;
 };
 
+inline bool operator < (const language_struct& language1, const language_struct& language2)
+{
+	return language1.displayvalue < language2.displayvalue;
+}
+
 extern std::vector<language_struct> Language_List;
 
 // Utility Functions