GUI: Speed up GUI loading by caching game sizes (#2130)

* Add show game size toggle

* Fix (#7)

* Fix

I removed the gameSizeCheckBox from the 'Emulator' group and put it in 'GUI settings'
hLayoutTrophy which contains the Trophy information was inside the GUIMusicLayout, so I fixed that too.

* TR

* Use cached sizes if the feature is enabled

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Co-authored-by: DanielSvoboda <daniel.svoboda@hotmail.com>

src/common/config.h

@@ -17,6 +17,8 @@ void saveMainWindow(const std::filesystem::path& path);
 
 std::string getTrophyKey();
 void setTrophyKey(std::string key);
+bool GetLoadGameSizeEnabled();
+void setLoadGameSizeEnabled(bool enable);
 bool getIsFullscreen();
 std::string getFullscreenMode();
 bool isNeoModeConsole();