Reload GfRaceManagers on downloadsmenu exit

This is required since _vecAcceptedCarCategoryIds must be reloaded so
that car categories are refreshed when entering the driver selection
menu.

src/libs/tgfdata/racemanagers.cpp

@@ -62,6 +62,12 @@ void GfRaceManagers::shutdown()
     _pSelf = 0;
 }
 
+void GfRaceManagers::reload()
+{
+    shutdown();
+    _pSelf = new GfRaceManagers;
+}
+
 GfRaceManagers::~GfRaceManagers()
 {
     std::vector<GfRaceManager*>::const_iterator itRaceMan;

src/libs/tgfdata/racemanagers.h

@@ -112,6 +112,7 @@ public:
     // Accessor to the unique instance of the singleton.
     static GfRaceManagers* self();
     static void shutdown();
+    static void reload();
 
     const std::vector<std::string>& getTypes() const;
 

src/modules/userinterface/legacymenu/mainscreens/downloadsmenu.cpp

@@ -13,6 +13,7 @@
 #include <portability.h>
 #include <cars.h>
 #include <tracks.h>
+#include <racemanagers.h>
 #include <drivers.h>
 #include "assets.h"
 #include "downloadsmenu.h"
@@ -1050,6 +1051,7 @@ DownloadsMenu::~DownloadsMenu()
     curl_multi_cleanup(multi);
     GfCars::reload();
     GfTracks::reload();
+    GfRaceManagers::reload();
     GfDrivers::self()->reload();
     GfuiScreenRelease(hscr);
     GfuiScreenActivate(prev);