Edit entry dialog separator (bullet) is rendered as a box with stripes (Mojave)

[zyv]

Overview

As requested in #4110 by @phoerious.

Steps to Reproduce

1. Install KeePassXC on macOS Mojave
2. Open database
3. Edit entry

Expected Behavior

A bullet point being rendered correctly.

Actual Behavior

Context

KeePassXC - Version 2.6.0
Revision: 0765954

Qt 5.15.0
Debugging mode is disabled.

Operating system: macOS Mojave (10.14)
CPU architecture: x86_64
Kernel: darwin 18.7.0

Enabled extensions:

• Auto-Type
• Browser Integration
• SSH Agent
• KeeShare (signed and unsigned sharing)
• YubiKey
• TouchID

Cryptographic libraries:
libgcrypt 1.8.5

[droidmonkey]

Doesn't do this in Catalina.

[quinncomendant]

Can we use the more common BULLET character • (U+2022), which is visually similar to BLACK SMALL DIAMOND ⬩ (U+2B29)? It should be available in more systems.

[droidmonkey]

Ping @phoerious