[Feature request] Menu item from a view in the running app indicates the selection

[michhar]

Hello. This is a feature request. Thank you for your time in reading this issue.

Environment

Flask-Appbuilder version: 4.1.3

Describe the expected results

Tell us what should happen.

This is a feature request. The idea is simply to have a template in which a menu item stays highlighted when it has been selected.

Describe the actual results

Tell us what happens instead.

As of now, the menu items are only highlighted when hovered over, but it does not persist once the item is selected and we are on that page.

Steps to reproduce

Create dash app with views/menus like

class ConfigDashboardAppCallBack(BaseView):
    datamodel = SQLAInterface(DashboardConfiguration)
    route_base = "/"

    @has_access
    @expose("/dashboard/")
    def methoddash(self):
        return self.render_template("dash.html",
                                    dash_url=dashboard_app.url_base,
                                    appbuilder=appbuilder)

appbuilder.add_view(ConfigDashboardAppCallBack,
                    "Dashboard",
                    icon="fa-list",
                    href="/dashboard/")

and run the app, hover over a menu item. It would be great if the highlight persisted when selected or some indication of which menu view we are in.

Again, thanks for reading. Great project. I use it quite a bit.