Wierd UI looking

Prerequisites

Please verify these before submitting an issue.

• I am running the latest versions of Termshark and Wireshark.
• I checked the README and User Guide and found no answer
• I searched issues and this has not yet been filed

Problem

Termshark TUI is wierd on archlinux.

Current Behavior

It looks wierd and different from README.md screenshots.

Expected Behavior

Just like what it likes like in README.md

Screenshots as applicable

Steps to Reproduce

1. Run termshark without any arguments

Context

Bash shell.

I've tried termshark on archlinux in WSL2, a real archlinux and ubuntu.

I use them through ssh.

In archlinux, TUI just broken like screenshots above.

BUT when I use ssh to connect to an ubuntu, and run termshark on it, it looks fine, even thought ssh runs on archlinux.

So I think there must be something wrong with termshark on archlinux, and it's not the terminal's problem, because termshark runs well throught ssh.

According to #126, I've tried export TERM=xterm-256color, but not thing changed.