[BUG] Separator Widget got removed when toolbarType is changed..

[plchekspend]

Describe the bug
When we change the toolbarType default(nativeScrollable) to any of the other options like nativeExpandable or nativeGrid then separatorWidget got removed.

To Reproduce
Steps to reproduce the behavior:

1. Under HtmlToolbarOptions property
2. set the toolbarType to toolbarType: ToolbarType.nativeGrid or nativeExpandable
3. See the below screenshots

Expected behavior
Even if we changed the toolbarType to any of the options separatorWidget need to show somehow.

Screenshots
when toolbarType is nativeGrid

When toolbarType is nativeExpandable and expanded manually

Device:
Found in Flutter web

Additional context
Also found this strange that if toolbarType is nativeExpandable and if toolbar is expanded then only separatorWidget got removed otherwise when it's not expanded then separatorWidget are shown.

[plchekspend]

any update @tneotia ?