fix(FieldOverlay): vertically center editor content

- add flex items-center to fitContainer overlay
- fixes editor appearing at top edge instead of centering on field label

client/src/components/fields/FieldOverlay.tsx

@@ -43,7 +43,7 @@ export function FieldOverlay({
     <div
       className={cn(
         'absolute z-50 rounded-md border border-input bg-background shadow-sm',
-        fitContainer ? 'inset-0' : 'left-0 top-0 min-w-full w-max',
+        fitContainer ? 'inset-0 flex items-center' : 'left-0 top-0 min-w-full w-max',
         className
       )}
       style={style}