Enhance Gamebryo Plugins Extension

[IDCs]

Problem: The plugins being in a different view from the mod list leads some new users to think it just sorts itself out and they don't need to touch it

Proposal: When a mod adds a plugin to the load order, notify the user that has happened.

Problem: Users often think LOOT is some kind of magic, indepth conflict resolution system and isn't basically just a user-generated tag list

Proposal: When the user first opens the "Plugins" tab, give a little pop-up summarising how the system works

Problem: When plugins are new (or have no LOOT data), there's a high chance they'll be sorted incorrectly

Proposal: If a plugin has no LOOT data at all, display a warning (where LOOT messages would normally show) telling them it may not get sorted correctly

[Pickysaurus]

Pop-up idea from https://next.nexusmods.com/profile/WallSoGB/about-me

[IDCs]

A counter has been added to highlight if/when new plugins are added to the plugins page.

Added more information on how loot works.

And finally added a message to inform users that LOOT does not have any metadata for the mod and may not be sorted correctly.