Fix #44639. RenderLineHighlight should not affect active line number color.

src/vs/editor/browser/viewParts/currentLineMarginHighlight/currentLineMarginHighlight.css

@@ -3,7 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-.monaco-editor .margin-view-overlays .current-line-margin {
+.monaco-editor .margin-view-overlays .current-line {
 	display: block;
 	position: absolute;
 	left: 0;
@@ -11,6 +11,6 @@
 	box-sizing: border-box;
 }
 
-.monaco-editor .margin-view-overlays .current-line-margin.current-line-margin-both {
+.monaco-editor .margin-view-overlays .current-line.current-line-margin.current-line-margin-both {
 	border-right: 0;
 }
\ No newline at end of file

src/vs/editor/browser/viewParts/currentLineMarginHighlight/currentLineMarginHighlight.ts

@@ -91,21 +91,21 @@ export class CurrentLineMarginHighlightOverlay extends DynamicViewOverlay {
 
 	public render(startLineNumber: number, lineNumber: number): string {
 		if (lineNumber === this._primaryCursorLineNumber) {
+			let className = 'current-line';
 			if (this._shouldShowCurrentLine()) {
 				const paintedInContent = this._willRenderContentCurrentLine();
-				const className = 'current-line-margin' + (paintedInContent ? ' current-line-margin-both' : '');
-				return (
-					'<div class="'
-					+ className
-					+ '" style="width:'
-					+ String(this._contentLeft)
-					+ 'px; height:'
-					+ String(this._lineHeight)
-					+ 'px;"></div>'
-				);
-			} else {
-				return '';
+				className = 'current-line current-line-margin' + (paintedInContent ? ' current-line-margin-both' : '');
 			}
+
+			return (
+				'<div class="'
+				+ className
+				+ '" style="width:'
+				+ String(this._contentLeft)
+				+ 'px; height:'
+				+ String(this._lineHeight)
+				+ 'px;"></div>'
+			);
 		}
 		return '';
 	}

src/vs/editor/browser/viewParts/lineNumbers/lineNumbers.ts

@@ -177,6 +177,6 @@ registerThemingParticipant((theme, collector) => {
 	}
 	const activeLineNumber = theme.getColor(editorActiveLineNumber);
 	if (activeLineNumber) {
-		collector.addRule(`.monaco-editor .current-line-margin ~ .line-numbers { color: ${activeLineNumber}; }`);
+		collector.addRule(`.monaco-editor .current-line ~ .line-numbers { color: ${activeLineNumber}; }`);
 	}
 });