Converting #17710 to an issue (attn @Luluser)

Sharing my work with different persons I have dealt with them having different OS and Matplotlib Backend and had to play pingpong game with trial and errors to make it work on their desktop.
I think for example that a backend versatile fullscreen command would be great. I have found examples on the web quite easily but even then in some cases it didn't work on my colleagues' computers.
Here is a slightly different code I modified from the one I found :

    plot_backend = get_backend()
    mng = plt.get_current_fig_manager()
    if plot_backend == 'TkAgg':#Seems to be the most used backend
        try:
            mng.window.state('zoomed')#for Windows users
        except _tkinter.TclError:
            mng.resize(*mng.window.maxsize())#for Ubuntu users
    elif plot_backend == 'wxAgg':
        mng.frame.Maximize(True)
    elif plot_backend == 'Qt4Agg':
        mng.window.showMaximized()   

I am new to pull request some I mark it as a draft one. There are probably some cases forgotten, I don't pretend this code is perfect on the contrary your recommendations and enhancements are welcomed.