Fixes microsoft#191637

Author: hediet

src/vs/editor/browser/widget/diffEditorWidget2/unchangedRanges.ts

@@ -250,7 +250,7 @@ class CollapsedCodeOverlayWidget extends ViewZoneOverlayWidget {
 	private readonly _nodes = h('div.diff-hidden-lines', [
 		h('div.top@top', { title: localize('diff.hiddenLines.top', 'Click or drag to show more above') }),
 		h('div.center@content', { style: { display: 'flex' } }, [
-			h('div@first', { style: { display: 'flex', justifyContent: 'center', alignItems: 'center' } },
+			h('div@first', { style: { display: 'flex', justifyContent: 'center', alignItems: 'center', flexShrink: '0' } },
 				[$('a', { title: localize('showAll', 'Show all'), role: 'button', onclick: () => { this.showAll(); } }, ...renderLabelWithIcons('$(unfold)'))]
 			),
 			h('div@others', { style: { display: 'flex', justifyContent: 'center', alignItems: 'center' } }),