logic: Added PCH support to CDB source groups (issue #311)

* added PCH Flags list and checkbox to reuse compiler flags and cdb flags to source group setup
* added UI tests for C++ and CDB source groups

testing/project_setup/cpp_empty_pch/data/src/Bar.h

@@ -0,0 +1,10 @@
+#ifndef FOO_H
+#define FOO_H
+
+#include "FooBar.h"
+
+class Bar : public FooBar
+{
+};
+
+#endif // FOO_H

testing/project_setup/cpp_empty_pch/data/src/Foo.h

@@ -0,0 +1,10 @@
+#ifndef BAR_H
+#define BAR_H
+
+#include "FooBar.h"
+
+class Foo : public FooBar
+{
+};
+
+#endif // FOO_BAR_H

testing/project_setup/cpp_empty_pch/data/src/FooBar.h

@@ -0,0 +1,12 @@
+#ifndef FOO_BAR_H
+#define FOO_BAR_H
+
+#ifdef COMPILER_FLAG
+
+class FooBar
+{
+};
+
+#endif
+
+#endif // FOO_BAR_H

testing/project_setup/cpp_empty_pch/data/src/main.cpp

@@ -0,0 +1,7 @@
+#include "pch.h"
+
+void test()
+{
+	Foo foo;
+	Bar bar;
+}

testing/project_setup/cpp_empty_pch/data/src/pch.h

@@ -0,0 +1,7 @@
+
+#ifdef PCH_FLAG
+
+#include "Foo.h"
+#include "Bar.h"
+
+#endif