small viewer bug fixes (#442)

small bug fixes

nerfactory/viewer/app/src/modules/ConfigPanel/ConfigPanel.jsx

@@ -120,7 +120,7 @@ export function RenderControls() {
       // output_options
       output_options: {
         label: 'Output Render',
-        options: outputOptions,
+        options: [... new Set(outputOptions)],
         value: outputChoice,
         onChange: (v) => {
           set_output_choice(v);

nerfactory/viewer/app/src/modules/SidePanel/CameraPanel/CameraPanel.jsx

@@ -48,6 +48,8 @@ function CameraList(props) {
       'Camera',
     ]);
     transform_controls.attach(camera);
+    const viewer_buttons = document.getElementsByClassName("ViewerWindow-buttons")[0];
+    viewer_buttons.style.display = 'block';
   };
 
   const delete_camera = (index) => {

nerfactory/viewer/app/src/modules/ViewerWindow/ViewerWindow.jsx

@@ -277,7 +277,7 @@ export default function ViewerWindow(props) {
           <CameraToggle />
         </div>
       </div>
-      <div className="ViewerWindow-buttons">
+      <div className="ViewerWindow-buttons" style={{display: 'none'}}>
         <TransformIcons sceneTree={sceneTree} />
       </div>
       <div className="ViewerWindow-render-crop-container">