Seen Steven Redmond's @stephencredmond tip https://www.qliktips.com/2021/01/revisiting-qlikview-cookbook-containers.html it looked promising to use.
However the button for switching the container object is fixed to the top right.
When the used tab name is to long the icon disappears
If the icon location would be placed (could be set) to the left side of the tab-name it would never disappear