[TD]fix camera/front buttons on Proj Group dialog

src/Mod/TechDraw/App/Preferences.cpp

@@ -589,3 +589,7 @@ int Preferences::BreakType()
 }
 
 
+bool Preferences::useCameraDirection()
+{
+    return getPreferenceGroup("General")->GetBool("UseCameraDirection", false);
+}

src/Mod/TechDraw/App/Preferences.h

@@ -135,6 +135,8 @@ public:
     static int BreakType();
 
     static bool useExactMatchOnDims();
+
+    static bool useCameraDirection();
 };