I am only an occasional user of Roundcube, but I also could not discover a way to do this. You may need to change your workflow to achieve the same results or use a different tool, such as a mail client.
There is also the option to create a second server that is exclusively for a separate Roundcube install. This would open up the option to install more plugins or otherwise customize Roundcube without fighting against the MiaB scripts. I’ve never done this, but I have looked at it and it seems viable.
I will see if anyone knows anything else. I had made the assumption that it was likely to work based on the older version/image thats linked from the Mail In A box home page for RoundCube…
Hi, I managed to figure out where the interface shown in the image posted by bluetardis resides.
I found in my installation via my webhost a user interface format called Larry.
I found this by going to settings > Preferences > User Interface
Under user interface is “Interface Skin”, my view default was set for Elastic but found Larry as a option. When selecting Larry, I was given the view from bluetardis’s image which allows you to see the flag for flagged emails.