Bugfix displaying bold composite font

[V-F]

BUG PdfGraphics2D: fixed simulating bold font symbols for selected bold logical font

[sixdouglas]

Hi @V-F ,

Is this fixing any known issue?
If so, could you make a reference to it using the # followed by its id?
If not, could you open one explaining the problem and giving the smallest sample code possible to reproduce it?

Can you also add a test (unit or sample) to cover these changes? And maybe squashing your commits would be nice.

Thanks for your help

[V-F]

Opened issue #314
Sample of code can be used as test unit if you want.