Hello again.
My main goal is to make some small changes (I hope so) to the T3 BS3 Blank Template.
The first would be this one:
I've notice that the main menu disappear when we change to a lower screen size (Extra Small Responsive Layout, for cell phones). This doesn't happen in the Medium Layout (Desktop size).
However, the mainmenu block appears in the block design of the template in all cases when you enter in the back-end. (Administrator side).
Regards.
Salvador.