Hi Den999, thanks for your post. Yes, considering that there is currently no option to change the width of the flags container, I can see how you arrive at that conclusion (and I will take that suggestion for adding the option in a future update). But I don't believe this is related to the fact that I would use PHP and CSS together.
You could override the
#flags width by placing this in your current style sheet:
Then it will remain there even after plugin updates and it should override styles in the plugin. Hopefully I am understanding this correctly. Let me know if that helps.