Fix clang-tidy

Author: schaumb

src/base/gfx/colortransform.cpp

@@ -6,7 +6,6 @@
 #include <utility>
 
 #include "base/text/funcstring.h"
-#include "base/text/smartstring.h"
 
 #include "color.h"
 

src/base/text/funcstring.cpp

@@ -3,6 +3,7 @@
 #include <array>
 #include <stdexcept>
 #include <string>
+#include <utility>
 
 #include "smartstring.h"
 

test/unit/base/gfx/color.cpp

@@ -11,7 +11,7 @@ const static auto tests =
         .add_case("Convertable from hex string",
             []
             {
-	            const Gfx::Color color("#12345678");
+	            auto color = Gfx::Color::fromString("#12345678");
 	            check() << color.red == 0x12 / 255.0;
 	            check() << color.green == 0x34 / 255.0;
 	            check() << color.blue == 0x56 / 255.0;