[BUG] process tree draw the wrong branch when it has only one child

[mrbeardad]

Describe the bug

Expected behavior

Screenshots

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Info (please complete the following information):

• btop4win version: 1.0.4
• Binary: binary from release
• Architecture: 64bit
• Windows Version: 22621.1848
• Terminal used: Windows Terminal v1.17.11461.0
• Font used: Nerd Font