Changes filter badge color to be more visible

src/webviews/apps/plus/graph/graph.scss

@@ -158,7 +158,7 @@ button:not([disabled]),
 		width: 0.8rem;
 		height: 0.8rem;
 		border-radius: 100%;
-		background-color: var(--vscode-focusBorder);
+		background-color: var(--vscode-progressBar-background);
 	}
 
 	small {