Fixes Graph default font size (matches VS Code)

Fixes Graph scrollbar styling

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

@@ -158,6 +158,9 @@ body {
 }
 
 .graph-app {
+	--fs-2: 1.3rem;
+	--scroll-thumb-bg: var(--vscode-scrollbarSlider-background);
+
 	padding: 0;
 
 	&__container {
@@ -182,3 +185,17 @@ body {
 		overflow: hidden;
 	}
 }
+
+::-webkit-scrollbar-thumb {
+	background-color: var(--vscode-scrollbarSlider-background);
+	border: unset !important;
+	border-radius: unset !important;
+
+	&:hover {
+		background-color: var(--vscode-scrollbarSlider-hoverBackground);
+	}
+
+	&:active {
+		background-color: var(--vscode-scrollbarSlider-activeBackground);
+	}
+}