Glyph Widgets Operate On View Positions, Not Model Positions

[hediet]

Monaco Editor Repro

As you can see, the positioning does not folding into account:

This breaks the revert arrows in the diff editor, as I adopted glyph widgets for them.

[joyceerhl]

We're deciding whether to render widgets based on ctx.visibleRange.startLineNumber and endLineNumber here

vscode/src/vs/editor/browser/viewParts/glyphMargin/glyphMargin.ts

Lines 276 to 281 in 620340c

	for (const widget of Object.values(this._widgets)) {
	const range = widget.preference.range;
	if (range.endLineNumber < visibleStartLineNumber || range.startLineNumber > visibleEndLineNumber) {
	// The widget is not in the viewport
	continue;
	}

but these are the viewport and not the model line numbers