cubicweb-squareui #3668337 Toggle left column visibility [validation pending]

Add a button to hide/dipslay the let column

prioritynormal
typeenhancement
done in0.3.1
load0.100
load left0.000
closed by#05ba78dfb556 [navbar] Add a button to toggle left column visibility (closes #3668337)
patch[navbar] Add a button to toggle left column visibility (closes #3668337) [applied]