Description:
When adding page borders, if a border such as one of the ones with two parallel lines is chosen, only one line is visible, and the corners appear corrupt, as in, they don't join.

If a solid single line border is used, it seems to work ok,

The width, padding, and shadow options all seem to do what they should, but changing these values doesn't seem to affect the problem.

To reproduce, create a new blank document, add a page border to all four borders, using the ninth non-blank border (the one that looks like two lines: =======).  The problem exists with the default options, but setting the width to something larger like 5 pt makes it even easier to see.  And apply.

In earlier versions of LibreOffice I had this page border on a document set to 9.0 pt width, padding of 0.5cm all around, a custom colour and a bottom right shadow at 0.3cm and it worked well.  That same document, opened in LibreOffice 6 now has a corrupt border.

When saving the file to PDF, the border saves as visible in LibreOffice (that is, PDF files saved from earlier versions have a good border, if I save a PDF of the file now, the border appears corrupt, as it does in LO).

I'm running the latest Windows 10 insider build, and I do have a higher DPI set (220% - which is the higher end of what Windows suggests for my 32" monitor).

Here is an image of the border settings and how the border appears: https://www.dropbox.com/s/5u9suehl8yh0y5w/LO%20Border.png

Steps to Reproduce:
1. Add a page border to a new or existing document.
2. Choose one of the multi-line borders (eg number 9: =====) and ensure it is set to all four borders.
3. Set any width / padding or leave the default.

Actual Results:  
Border shows only one line, and corners have strange blocks and do not line up.

Expected Results:
Expected to see a nice double line border like train tracks neatly around the document.


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 6.0.3.2 (x64)
Build ID: 8f48d515416608e3a835360314dac7e47fd0b821
CPU threads: 8; OS: Windows 10.0; UI render: default; 
Locale: en-AU (en_AU); Calc: group


User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36