Spectate picker

Quickly search and spectate current server players.

Options:

• enable/disable showing spectating players
• choose number of columns to display players on

Changelog 7/19/2021 (2.0):

• Plugin is now signed !

Changelog 7/18/2021:

• Fix broken API calls for spectating
• Change behavior of the listing in order to prevent a potential crash, the player list won't be automatically refreshed on a map change, user will have to click the Refresh button

Changelog 7/18/2021:

• Fix compilation after API change in Openplanet's handling of enums

Changelog 2/26/2021:

• Fix: Fixed a "random" but likely to happen crash during map change
• Fix: Couldn't spec when searching a player :kappa: