Conform partial clips with black gaps

From manual: "Inserts black frames whenever you conform a clip that doesn’t contain all the required frames. When this option is selected, partial clips are flagged in the Edit page with a P in the thumbnail of the clip that it is lacking frames."

It would be good if the lacking frame could also be seen in the timeline. Similar like frames that are already used in the timeline are displayed in the clips with a colored lines. Or I can also imagine a gray grid in a clip. So it would immediately see where the lacking frames are.