The first opened tab name has the extended directory format

**Describe the bug**

The first opened tab name has the extended directory format even if the Main Window option `Abbreviate directories in tab names` is enabled.

GIF proof

**Expected behavior**

The first opened tab name should have the abbreviated directory format

**Actual behavior**

The first opened tab name has the extended directory format

**To Reproduce**

1. enable the Main Window option `Abbreviate directories in tab names`
1. open a tab
1. cd into a directory

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> Please run `$ guake --support`, and paste the results here. Don't put backticks (`` ` ``) around it! The output already contains Markdown formatting. And make sure you run the command **OUTSIDE** the Guake.

$ guake --support

Guake Version: 3.6.3

Vte Version: 0.60.1

Vte Runtime Version: 0.60.1

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GTK+ Version: 3.24.18

GDK Backend: GdkX11.X11Display

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Desktop Session: ubuntu

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Display: :1

RGBA visual: True

Composited: True

* Monitor: 0 - ACI HDMI-0
* Geometry: 2560 x 1080 at 0, 0
* Size: 673 x 284 mm²
* Primary: True
* Refresh rate: 59.98 Hz
* Subpixel layout: unknown