Tab name dont change after switching between split terminals

**Describe the bug**

Tab name dont change when switching between split terminals

**To Reproduce**
1. Open guake.
2. Split terminal ( automatically focus in new terminal).
3. `cd` another direcotry, you can see the tabname changed.
4. Switch to previous terminal, tab name keep the same as in step 3.

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$ guake --support

Guake Version: 3.7.0

Vte Version: 0.52.2

Vte Runtime Version: 0.52.2

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GTK+ Version: 3.22.30

GDK Backend: GdkX11.X11Display

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Desktop Session: /usr/share/xsessions/plasma

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Display: :0

RGBA visual: True

Composited: True

* Monitor: 0 - HDMI-0
* Geometry: 2560 x 1440 at 0, 0
* Size: 553 x 311 mm²
* Primary: True
* Refresh rate: 59.95 Hz
* Subpixel layout: unknown
* Monitor: 1 - DP-0
* Geometry: 1920 x 1080 at 2560, 0
* Size: 527 x 296 mm²
* Primary: False
* Refresh rate: 60.00 Hz
* Subpixel layout: unknown