Fix subpixel AA for settings TOC list

Fix #85106

src/vs/workbench/contrib/preferences/browser/media/settingsEditor2.css

@@ -216,14 +216,13 @@
 	overflow: hidden;
 	text-overflow: ellipsis;
 	line-height: 22px;
-	opacity: 0.9;
 	flex-shrink: 1;
 }
 
 .settings-editor > .settings-body .settings-toc-container .monaco-list-row .settings-toc-count {
 	display: none;
 	line-height: 22px;
-	opacity: 0.7;
+	opacity: 0.8;
 	margin-left: 3px;
 }
 
@@ -231,17 +230,8 @@
 	display: block;
 }
 
-.settings-editor > .settings-body .settings-toc-container .monaco-list-row .monaco-tl-twistie {
-	opacity: 0.9;
-}
-
-.settings-editor > .settings-body .settings-toc-container .monaco-list-row.selected .monaco-tl-twistie {
-	opacity: 1;
-}
-
 .settings-editor > .settings-body .settings-toc-container .monaco-list-row.selected .settings-toc-entry {
 	font-weight: bold;
-	opacity: 1;
 }
 
 .settings-editor > .settings-body .settings-tree-container {

src/vs/workbench/contrib/preferences/browser/settingsTree.ts

@@ -1481,6 +1481,8 @@ export class SettingsTree extends ObjectTree<SettingsTreeElement> {
 				// applying an opacity to the link color.
 				const fgWithOpacity = new Color(new RGBA(foregroundColor.rgba.r, foregroundColor.rgba.g, foregroundColor.rgba.b, 0.9));
 				collector.addRule(`.settings-editor > .settings-body > .settings-tree-container .setting-item-contents .setting-item-description { color: ${fgWithOpacity}; }`);
+
+				collector.addRule(`.settings-editor > .settings-body .settings-toc-container .monaco-list-row:not(.selected) { color: ${fgWithOpacity}; }`);
 			}
 
 			const errorColor = theme.getColor(errorForeground);

src/vs/workbench/contrib/preferences/browser/tocTree.ts

@@ -10,7 +10,7 @@ import { IObjectTreeOptions, ObjectTree } from 'vs/base/browser/ui/tree/objectTr
 import { ITreeElement, ITreeNode, ITreeRenderer } from 'vs/base/browser/ui/tree/tree';
 import { Iterator } from 'vs/base/common/iterator';
 import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
-import { editorBackground } from 'vs/platform/theme/common/colorRegistry';
+import { editorBackground, transparent, foreground } from 'vs/platform/theme/common/colorRegistry';
 import { attachStyler } from 'vs/platform/theme/common/styler';
 import { IThemeService } from 'vs/platform/theme/common/themeService';
 import { SettingsTreeFilter } from 'vs/workbench/contrib/preferences/browser/settingsTree';
@@ -215,8 +215,8 @@ export class TOCTree extends ObjectTree<SettingsTreeGroupElement> {
 			listFocusAndSelectionBackground: editorBackground,
 			listFocusAndSelectionForeground: settingsHeaderForeground,
 			listFocusBackground: editorBackground,
-			listFocusForeground: settingsHeaderForeground,
-			listHoverForeground: settingsHeaderForeground,
+			listFocusForeground: transparent(foreground, 0.9),
+			listHoverForeground: transparent(foreground, 0.9),
 			listHoverBackground: editorBackground,
 			listInactiveSelectionBackground: editorBackground,
 			listInactiveSelectionForeground: settingsHeaderForeground,