Bug: Clicking Dropdown item makes Dropdown flicker/repaint due to collapse/expand happening

[sglebs]

Describe the bug
If you create a long Dropdown (say 7 items) you will see that when you click one of the elements there is an ugly UI flicker, a repaint. In fact, the menu/dropdown first collapses (as if the little triangle were clicked) and then expanded again and the clicked item is selected.

To Reproduce

• Configure like Bug: Icons not showing when menu item is in a Dropdown #578
• Add many more subitems
• Add regular items before & after
• Run. Expand the Dropdown. Now click. You will notice the behavior

Environment (please complete the following information):

• Starlette-Admin version: 0.14.0
• ORM/ODMs: SQLAlchemy, psycopg2-binary==2.9.9
• SQLAlchemy-serializer==1.4.1

Additional context
N/A

[sglebs]

I also noticed that if you click one of the other items and the Dropdown is collapsed, the Dropdown will expand also. It is as if it does not remember its state. Should I enter a separate issue? I already entered 3 bug reports for Dropdown today, so I figured there was no need.

[evgenybf]

It flickers for me too. Also, when I click in a view from the drop down list, the list gets collapsed despite always_open=True

admin.add_view(
    DropDown(
        "Main",
        icon="fa fa-list",
        views=[
            UserView(User, identity="user"),
            UserEmailView(UserEmail, identity="email"),
        ],
        always_open=True,
    )
)

Online demo: https://starlette-admin-demo.jowilf.com/admin/mongoengine/category/list
It flickers when I select an item from the "Store" drop down.
FF 130.0.1, Chrome 129.0.6668.60

[evgenybf]

starlette-admin/starlette_admin/templates/macros/views.html

Line 41 in 9e50bc9

<a class="nav-link dropdown-toggle {% if view.is_active(request) %}show{% endif %}"

Removing "show" here helps from closing the drop down when it looses focus. It still flickers, but only for the first time after the drop down is opened.

UPD: Checked with sqladmin. They use "active" instead of "show". It also gets collapsed and expanded on the first click.

https://github.com/aminalaee/sqladmin/blob/d99817aa25edf9039e381f42f5ea2a351457e012/sqladmin/templates/sqladmin/_macros.html#L4