Desktop: "Save mermaid" button adds extra space above diagrams when invisible

[personalizedrefrigerator]

Operating system

Linux

Joplin version

2.13.15

Desktop version info

Joplin 2.13.15 (prod, linux)

Client ID: 24b2a961cccf40fe8448cdc0930b6fce
Sync Version: 3
Profile Version: 44
Keychain Supported: No

Revision: 7d2c1c0

Freehand Drawing: 2.7.1
RevealJS Integration: 0.7.0
Simple Backup: 1.3.6
Work tracker: 0.0.1

Current behaviour

Currently, the "save mermaid diagram" button adds about 30px of additional space above mermaid diagrams in the viewer:

This causes diagrams to have more space above than below:

Expected behaviour

Ideally, diagrams should be vertically centered (the save button should overlay the diagram).

Logs

No response