columns visible & responsive

hi in this example I have 3 questions ...
1st question .... I would like the name of the column "Columns1" but its button "Button Columns1"
"Columns2" but its "CustomColumns2" button
2nd question .... if I put the column with the "desktop" class and I am in "tablet-l" mode and I want to see that table, it does not make me add it
3rd question ...... I have bStateSave: true, but when I re-enter it I reset the columns based on the class "desktop" or "tablet-l" etc .... depending on the screen and does not take into account the status previous one