Broken support for EPUBs with scripted visual user interaction / drag-and-drop

[danielweck]

The CSS is fine in the user interface:

thorium-reader/src/renderer/assets/styles/global.css

Lines 130 to 135 in 47c6f39

	*,
	*::after,
	*::before {
	-webkit-user-drag: none;
	-webkit-app-region: no-drag;
	}

thorium-reader/src/renderer/assets/styles/reader-app.css

Lines 55 to 60 in 47c6f39

	*,
	*::after,
	*::before {
	-webkit-user-drag: none;
	-webkit-app-region: no-drag;
	}

... but problematic inside EPUB XHTML content documents:

thorium-reader/src/main/streamerCommon.ts

Lines 93 to 98 in 47c6f39

	*,
	*::after,
	*::before {
	-webkit-user-drag: none !important;
	-webkit-app-region: no-drag !important;
	}

thorium-reader/src/main/streamerCommon.ts

Lines 110 to 116 in 47c6f39

	document.addEventListener("dragstart", (e) => {
	const sel = document.getSelection();
	if (sel && !sel.isCollapsed) {
	// e.dataTransfer.setData("Text", "_");
	e.preventDefault();
	}
	});