Bar with tabs is not shown initially unless F11 is pressed twice.

**Describe the bug**

After starting guake the tabs dont' show up, only after maximizing with F11 and back is that the tabs show up. This happens everytime I start a new guake process, i.e. when I first open guake after a reboot, or after `killall guake`.

The size of Guake is preserved between killed Guake processes.

**Expected behavior**

I expect to see the bottom bar with the tabs after starting Guake for the first time without having to maximize the window with F11.

**Actual behavior**

I don't see the bar with the tabs after starting Guake for the first time without having to maximize the window with F11.

**To Reproduce**

In my system this happens everytime a new guake process is launched (not every time I open a window, just the first time the guake process opens a window.)

-------------------------------------------------------------------------------

$ guake --support

Guake Version: 3.8.6.dev20

Vte Version: 0.68.0

Vte Runtime Version: 0.68.0

--------------------------------------------------
GTK+ Version: 3.24.33

GDK Backend: