fix #470 - "Find all" results are not clickable if the file is a C/C++ source

src/u_common.pas

@@ -1307,6 +1307,8 @@ begin
   result := false;
   case ext of
     '.d', '.di', '.dd', '.lst', '.md', '.txt', '.map' , '.sx': result := true;
+    else if hasCppSyntax(ext) then
+      result := true;
   end;
 end;