fix(ui): scrolling in builder

I am at loss as the to cause of this bug. The styles that I needed to change to fix it haven't been changed in a couple months. But these do seem to fix it.

Closes #7910

invokeai/frontend/web/src/features/nodes/components/sidePanel/builder/WorkflowBuilder.tsx

@@ -23,7 +23,6 @@ import { assert } from 'tsafe';
 const sx: SystemStyleObject = {
   pt: 3,
   w: 'full',
-  h: 'full',
   '&[data-is-empty="true"]': {
     pt: 0,
   },

invokeai/frontend/web/src/features/nodes/components/sidePanel/viewMode/ViewModeLeftPanelContent.tsx

@@ -36,7 +36,7 @@ const ViewModeLeftPanelContentInner = memo(() => {
   }
 
   return (
-    <Flex w="full" h="full" justifyContent="center">
+    <Flex w="full" justifyContent="center">
       <RootContainerElementViewMode />
     </Flex>
   );