Description:
All the lines (tables, arrows, shapes) disappear if the display zoom is not great enough while editing the documents.

The PDF export is not affected.

I saw this behavior with Drawing (shapes) and Writer (table).

It happens whatever the line width, but the wider the line is, the smaller the zoom should be to make the lines disappear.



Steps to Reproduce:
1. Open my document
2. Zoom to see all the objects
3. Unzoom untill the lines disapear

Actual Results:
The lines disappear

Expected Results:
The lines shoul not disappear


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 6.2.1.2
Build ID: 7bcb35dc3024a62dea0caee87020152d1ee96e71
CPU threads: 8; OS: Mac OS X 10.12.6; UI render: GL; VCL: osx; 
Locale: en-GB (en_FR.UTF-8); UI-Language: en-US
Calc: threaded