Fixes #18872 Fix symbol selector dialog overflows the screen on small resolution

[hanreev]

Description

Fixes #18872

Checklist

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[DelazJ]

hi @hanreev thanks for the fix. Does it scale well also in the layer styling panel? I mean no vertical scroll bar that would unnecessarily shrink the useful width? I remember there was a double scroll bar issue in an old release. Sorry I can't test myself.

[hanreev]

@DelazJ i'm not sure about vertical sroll bar in styling panel. will re-test it today

[hanreev]

Everything works fine on macOS and Windows. Hopefully works on linux too.

• Layer properties
• Renderer settings dialog
• Layer styling panel

macOS 10.13.6

Windows 10

[DelazJ]

Great, thanks!