Fetch updated gamepad mappings each launch

app/app.pro

@@ -132,6 +132,7 @@ SOURCES += \
     cli/commandlineparser.cpp \
     cli/quitstream.cpp \
     cli/startstream.cpp \
+    settings/mappingfetcher.cpp \
     settings/streamingpreferences.cpp \
     streaming/input/abstouch.cpp \
     streaming/input/gamepad.cpp \
@@ -155,6 +156,7 @@ SOURCES += \
 
 HEADERS += \
     backend/nvapp.h \
+    settings/mappingfetcher.h \
     utils.h \
     backend/computerseeker.h \
     backend/identitymanager.h \