#388 Ability to maximise window

[xtal256]

Maximising of the window is disabled (the maximise button is greyed out and double-clicking the title bar does nothing).

This should be possible, as the window is able to be resized. Even though the size does round to the nearest number of columns and rows, it still should be possible to have it maximise. Either just have a small gap at the bottom and/or right like Windows console does, or adjust the padding of the inside border.

[xtal256]

Note: This could be considered a duplicate of 3537422, but also note that there is a (slight) difference between maximised and fullscreen modes.

[chrisz]

This feature is present in this fork: https://github.com/cbucher/console.