`qterminal --execute ncmpc` should change window title

[concatime]

Using qterminal --execute ncmpc, I've found that the window title is Shell No. 1.
I'm using i3 and I need to be able to run a cli app inside a terminal and assign it a proper workspace.
For this, the window should be identifiable (for example, xterm -name nvlc -e nvlc).

Expected Behavior

Title is ncmpc <directory>

Current Behavior

Title is Shell No. 1

Steps to Reproduce (for bugs)

1. qterminal --execute nvim
   WM_NAME(STRING) = "ncmpc /home/issam"

Context

Assign nvim to workspace X and ncmpc to workspace Y.

System Information

• Distribution & Version: Arch
• Kernel: 4.18.5-arch1-1-ARCH
• Qt Version: Qt version 5.11.1 in /usr/lib

[concatime]

dup. of #334