Add thumbnails for startrails/keo/timelapse to main Images Page in WebUI

[NiteRide]

Proposed Enhancement

• display thumbnail image for startrails, keogram, and timelapse in lieu of thumbnails on the "Images" page in WebUI
  • Will give users a nice visual to work with if and when they navigate to the page
  • Makes it easier for a user to quickly find a day's folder they are interested in digging into
  • low/no risk to any other processes or code
  • more "fun and friendly"

[EricClaeys]

The code to do this is in v2025.xx.xx but disabled.
We're not sure if we like it. It might be more useful once startrails and keograms have thumbnails - right now just timelapse have thumbnails.

Possible make this a user option?

Current way with icons:

With thumbnails: