Restoring a maximized Terminal window doesn't return the Terminal window to original dimensions

[Tomas Cassidy]

What goes wrong:

When a terminal window is maximized, clicking the "return" button in the title bar doesn't return the window to the original dimensions.

What should happen:

Clicking the "return" button on a maximized terminal window should return the window to the original dimensions.

Steps to reproduce:

1. Open a Terminal.
2. Click "maximize" buttton in title bar (square button) to maximize the window to fullscreen.
3. Click the "return" button in title bar (rectangle button) to return the window to the previous dimensions.
4. The window dimensions will change from full screen to "almost" full screen.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gnome-terminal 3.18.3-1ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Jun 10 16:09:48 2016
InstallationDate: Installed on 2014-07-22 (689 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: gnome-terminal
UpgradeStatus: No upgrade log present (probably fresh install)