Fix clang includes.

include/tool/tool_manager.h

@@ -31,12 +31,18 @@
 #include <list>
 #include <map>
 #include <stack>
+#include <vector>
 #include <typeinfo>
 #include <type_traits>
 
 #include <tool/tool_base.h>
 #include <tool/tool_event.h>
-#include <view/view_controls.h>
+
+namespace KIGFX
+{
+class VIEW_CONTROLS;
+struct VC_SETTINGS;
+}
 
 class COMMIT;
 class TOOLS_HOLDER;