Feature: Have a UI to navigate the shots

[SeeringPhil]

The new update from Rocketstats made me think about adding a UI to this plugin that could be used to navigate the saved shots.

This UI could be used to

• Navigate shots
  • NTH: Display in a grid, in a list
  • NTH ² : Show an image of the shot. Maybe display a 2d plot of the position of the player and the ball instead of a screenshot, since the plugin has access to this information?
• Tag shots
• Filter shots according to tags
• There could be an edit button next to shots that could start training and be in the edition mode talked about in this issue: https://github.com/NitrOP7674/FreeplayCheckpoint/issues/19
• Inspired by Rocketstats, there could be a little "overlay" button that could show up to bring up this UI while in training (I think this should be an option however, I find this overlay to clutter my UI and wish to disable it in rocketstats but it is not yet possible (they said they're working on it however, so inspiration could come from there too))

NTH = Nice to have

[NitrOP7674]

A lot of good ideas, but this is beyond my goals for this plugin. I agree these things would be nice to have, but I'm not a UI/graphics guy, and I also don't think I'd use them, personally. I am happy to accept pull requests, though, if someone ambitious wants to work on it.