Short description of error
it is not possible to hide the top bar and the status bar in "full space window mode"
Exact steps for others to reproduce the error
when I press ctrl + spacebar for accessing the full window mode even if I have hidden the tob bar and the status bar, they always reappear, and if i hide them again and return ctrl + spacebar and return to full space window they reappear .. In addition, the choice can not be saved as a default blender setting
p.s. a little suggestion :
when I hide the status bar I need the information of the geometry and the available memory .. would be appropriate if those information were put for example in transparency in the 3d view in a corner below