Modding Help Let the player say something

What I want to achieve:
I want the player to say something. The trigger is the "Take all" button of a chest. In the callback of the button there is a situation when I want to show a chat text bubble above my character saying "My inventory is full!" or something similar.

Technically:
I know that I cannot simply call "player.sayPortrait" because the "say" or "sayPortrait" is for NPCs only. In another thread (https://community.playstarbound.com...-text-bubble-on-player-with-lua-magic.104597/) the solution is to use "world.spawnProjectile" for showing text, but it doesn't look like a chat bubble: I'm missing a background color and border around the text for better visibility.

Can someone please guide me to the right direction? I'm willing to learn but at the moment I don't have any idea how to proceed.

Thank you!

 

... or is it possible to make a projectile following the player? Currently it is fixed at the position where the player was at the moment of the call:

Code:

world.spawnProjectile(
    "invisibleprojectile",
    world.entityPosition(pane.playerEntityId()),
    pane.playerEntityId(),
    {0,0},
    true,
    {
        damageType = "NoDamage",
        actionOnReap = {
            action = "particle",
            specification = {
                text = "Big red words!",
                size = 1,
                color = {255, 0, 0, 255},
                destructionAction = "fade",
                timeToLive = 5,
                destructionTime = 0.0,
                layer = "front",
                position = {0,5},
                initialVelocity = {0,0},
                finalVelocity = {0,0},
                type = "text"
            }
        }
    }
)