libreoffice: Use the Elementary icon theme by default

[EbonJaeger]

Summary

• Use the Elementary icon theme by default

Fixes https://github.com/getsolus/packages/issues/311

Signed-off-by: Evan Maddock maddock.evan@vivaldi.net

Test Plan

Open Writer and switch the GTK theme on Budgie between different light and dark themes.

Checklist

• [x] Package was built and tested against unstable