feat(ui): rework add node select

- `space` and `/` open floating add node select
- improved filter logic (partial word matches)

invokeai/frontend/web/src/features/nodes/components/NodeEditor.tsx

@@ -9,6 +9,7 @@ import 'reactflow/dist/style.css';
 import NodeEditorPanelGroup from './sidePanel/NodeEditorPanelGroup';
 import { Flow } from './flow/Flow';
 import { AnimatePresence, motion } from 'framer-motion';
+import AddNodePopover from './flow/AddNodePopover/AddNodePopover';
 
 const NodeEditor = () => {
   const [isPanelCollapsed, setIsPanelCollapsed] = useState(false);
@@ -57,9 +58,10 @@ const NodeEditor = () => {
                   opacity: 0,
                   transition: { duration: 0.2 },
                 }}
-                style={{ width: '100%', height: '100%' }}
+                style={{ position: 'relative', width: '100%', height: '100%' }}
               >
                 <Flow />
+                <AddNodePopover />
               </motion.div>
             )}
           </AnimatePresence>