* fix: tokenizer will count completion tokens correctly, remove global var, will allow unofficial models for alternative endpoints
* refactor(askBingAI.js, Settings.jsx, types.ts, cleanupPreset.js, getDefaultConversation.js, handleSubmit.js): change default toneStyle to 'creative' instead of 'fast' for Bing AI endpoint.
* fix(SiblingSwitch): correctly appears now
style(HoverButtons.jsx): add 'active' class to hover buttons
