* Customizable Island Creation Panel
This implements customizable Island Creation Panel. By default, panel is generated in `/plugins/bentobox/panels` folder, however, if GameModeAddon has a specific panel defined in their folder, then that panel is taken.
* Create UnitTests for new panels
* Add island creation panel saving on loading
* Remove old IslandCreationPanel and move to the new one.
* Fixes some issues with locale and panel
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Co-authored-by: tastybento <tastybento@users.noreply.github.com>
* Customizable Language Selection Panel
This implements customizable Language Selection Panel. By default, panel is generated in `/plugins/bentobox/panels` folder, however, if GameModeAddon has a specific panel defined in their folder, then that panel is taken.
* Migrate LanguagePanelTest to customizable panel.
* Remove original LanguagePanel
* Save language_panel.yml on server starting.
* Fixes some bugs in LanguagePanel.
