Created attachment 121406 [details]
Screenshot of arrows section of the "Gallery"

Some arrows are not visible in the gallery sidebar

Steps to Reproduce

1. Open LibreOffice Writer, Impress or Draw
2. In the sidebar, click on "Gallery"

Current Behaviour

Some arrows under the arrows section of the "Gallery" are not visible. The arrows can still be applied to a document and appear when dragged into the document.

Expected Behaviour

All arrows should be visible in the arrows section of the "Gallery".

Screenshot is attached. This issue was not present a few days ago so it is a regression if reproduced.

Tested with:

LibreOffice Version: 5.2.0.0.alpha0+
Build ID: a103c3456a2bd12c5c94124abeda06978caea609
CPU Threads: 4; OS Version: Linux 4.3; UI Render: default; 
TinderBox: Linux-rpm_deb-x86_64@70-TDF, Branch:master, Time: 2015-12-19_00:00:00
Locale: en-AU (en_AU.UTF-8)

OS: Ubuntu Gnome 16.04

Graphics stack: 

OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD BONAIRE (DRM 2.43.0, LLVM 3.6.2)
OpenGL core profile version string: 3.3 (Core Profile) Mesa 11.0.7