Move node graph from panel to overlay on viewport

frontend/src/components/window/workspace/Workspace.svelte

@@ -14,8 +14,7 @@
 	const PANEL_SIZES = {
 		/**/ root: 100,
 		/*   ├── */ content: 80,
-		/*   │      ├── */ document: 50,
-		/*   │      └── */ graph: 50,
+		/*   │      ├── */ document: 100,
 		/*   └── */ details: 20,
 		/*          ├── */ properties: 45,
 		/*          └── */ layers: 55,
@@ -111,12 +110,6 @@
 					bind:this={documentPanel}
 				/>
 			</LayoutRow>
-			{#if $portfolio.documents.length > 0}
-				<LayoutRow class="workspace-grid-resize-gutter" data-gutter-vertical on:pointerdown={resizePanel} />
-				<LayoutRow class="workspace-grid-subdivision" styles={{ "flex-grow": panelSizes["graph"] }} data-subdivision-name="graph">
-					<Panel panelType="NodeGraph" tabLabels={[{ name: "Node Graph" }]} tabActiveIndex={0} />
-				</LayoutRow>
-			{/if}
 		</LayoutCol>
 		<LayoutCol class="workspace-grid-resize-gutter" data-gutter-horizontal on:pointerdown={(e) => resizePanel(e)} />
 		<LayoutCol class="workspace-grid-subdivision" styles={{ "flex-grow": panelSizes["details"] }} data-subdivision-name="details">