Boss Bar Begone

v1.0.2:
- Fixed an "Error executing task" error in the log every time the server updated a hidden boss bar (health, color, style or name). 1.0.1 removed hidden bars from the game's list, so every update sent for them failed. Hidden bars now stay in the list and are only left out when the boss bars are drawn.
- New settings screen, opened from Mod Menu: remove a name, add one with the Add button or the Enter key, and hide any bar that is on screen right now with one click. Mod Menu is optional; without it, edit config/bossbarbegone.json as before.
- Translation keys: an entry such as entity.minecraft.wither hides that boss in every language. Plain text still works as before (part of the bar's text, case ignored).
- New hide_effects setting, off by default: a hidden bar keeps its dark sky, fog and dragon music, like a vanilla fight without its HUD. Turn it on, in the file or with the button on the settings screen, to remove those effects too. In 1.0.1 they always went away with the bar.
- Changes to config/bossbarbegone.json now apply without restarting the game.
- A config file with a typo no longer resets your settings: the error is written to the log and the previous settings stay active. If you then save from the settings screen, the unreadable file is kept as bossbarbegone.json.broken.
- Install it on the client. Existing configs keep working.