v4.7.40 & v4.7.41
removed css "--japanese-text-button-too-long-squeezing-channel-name-unable-display"
added"--hide-menu-icon-text-by-default"
added "--fix-tooltips-display" (inset hack and no white-space)
modified related mechanism for tabview-uploader-hover to keep expansion when holding buttons "チャンネル登録" and "メンバーになる" etc
added updated MIT licenses to JavaScript files;
added new tool for customElements (see https://greasyfork.org/en/scripts/465819-api-for-customelements-in-youtube)
(4.7.40 served as a copy for backup codes)
widen playlist button for japanese layout
adjusted tab button padding
removed old unused codes
changed some console.log to console.debug
v4.7.42
changed css for ytd-watch-metadata menu buttons