Description:
On Linux Cinnamon desktop, some LibreOffice dialogs (such as Options)
have their bottom buttons hidden behind the Cinnamon panel.

If the Cinnamon panel auto-hide is enabled, the buttons become visible.
If auto-hide is disabled, the dialog cannot be resized enough to reach the buttons.

This appears to be a window sizing / reserved screen area issue with Cinnamon.


Steps to Reproduce:
1. Log in to a Linux system using the Cinnamon desktop.
2. Ensure the Cinnamon panel is visible (auto-hide disabled) and positioned at the bottom of the screen.
3. Open any LibreOffice application (Writer, Calc, Impress, etc.).
4. Open a dialog with bottom buttons (for example:
   Tools → Options, or File → Properties).
5. Observe the bottom of the dialog window.


Actual Results:
In all LibreOffice applications (Writer, Calc, Impress, etc.),
the bottom buttons of some dialogs (OK / Cancel / Apply) are
partially or fully hidden behind the Cinnamon panel.

The dialog cannot be resized or moved enough to access the buttons.

If the Cinnamon panel is set to auto-hide, the buttons become visible.


Expected Results:
All LibreOffice dialogs should respect the reserved screen space of
the Cinnamon panel, regardless of which LibreOffice application is used.
All dialog buttons should always be fully visible.



Reproducible: Always


User Profile Reset: No

Additional Info:
Version: 25.8.4.2 (X86_64) / LibreOffice Community
Build ID: 580(Build:2)
CPU threads: 4; OS: Linux 6.14
UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Ubuntu package version: 4:25.8.4~rc2-0ubuntu0.24.04.1~lo1
Calc: threaded

Desktop environment: Cinnamon
Window manager: Muffin
Panel position: bottom
Panel auto-hide: OFF (issue occurs), ON (issue disappears)
Affects all LibreOffice applications (Writer, Calc, Impress, etc.)