I'm running into an issue with how the settings are initialized in the config section. Boolean flags are strings in vm.settings when it is initialized. It's not difficult to work around, but it would be nice to have boolean flags returned as booleans. Currently I have

<umb-control-group label="Sandbox Mode" description="Enable sandbox mode.">
   <umb-toggle checked="vm.settings.sandboxMode === 'true' || vm.settings.sandboxMode === true"
            on-click="pvm.toggle(vm.settings)">
   </umb-toggle>
</umb-control-group>

when I would like to be able to do

<umb-control-group label="Sandbox Mode" description="Enable sandbox mode.">
   <umb-toggle checked="vm.settings.sandboxMode" //changed checked expression
            on-click="pvm.toggle(vm.settings)">
   </umb-toggle>
</umb-control-group>

In the checked expression, "false" evaluates to true, so I currently have to add a couple additional checks to handle that.