グルドン拡張

Makes the グルドン interface more convenient. Makes the グルドン (https://mstdn.guru/) interface more convenient. == Features == * Keeps a Mixlr player near the bottom left of the screen (ver0.1) * Keeps the latest video from the drikin YouTube channel near the bottom left of the screen (ver0.3) == Update history == * ver0.6 - Added a minimize feature so the input field is not obscured - Added links related to backspace.fm * ver0.5 - Changed the live stream player from Mixlr to Twitch * ver0.4 - Fixed an issue that prevented interaction with the added YouTube and Mixlr players * ver0.3 - Keeps the latest video from the drikin YouTube channel near the bottom left of the screen * ver0.2 - Minimized the display size of the Mixlr player - Fixed an issue where the Mixlr player appeared twice in the advanced UI * ver0.1 - Keeps a Mixlr player near the bottom left of the screen