Added support for CheckboxFlags that can set multiple flags at the same time.

imgui.cpp

@@ -6907,12 +6907,14 @@ bool ImGui::Checkbox(const char* label, bool* v)
 
 bool ImGui::CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value)
 {
-    bool v = (*flags & flags_value) ? true : false;
+    bool v = ((*flags & flags_value) == flags_value);
     bool pressed = ImGui::Checkbox(label, &v);
+    if(pressed) {
         if (v)
             *flags |= flags_value;
         else
             *flags &= ~flags_value;
+    }
     return pressed;
 }