Set Pic ID: Add better visualisation and more edge cases

[Ghabry]

(overlap + partially incorrect IDs)

(also notice the render order when looking at the 5 above the blue line)

[Mimigris]

• The text of the events at (4, 1), (5, 1) (8, 1), (9, 1) are incorrect: the text interprets the size of the array as if it was bigger by 1
• The event at (13, 1) mentions a slide of the pictures 3 ~ 4, but actually slides the IDs 4 ~ 5, which leads to an overlap with the IDs 5 ~ 6 previously edited by the same event

[Ghabry]

wow I cannot count. Fixed thanks

[Mimigris]

Looks good to me, should be able to be merged 👍