fpvectorial: svg: Reworks the text span style stack system, now it shows the red in the new example

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44395 4005530d-fff6-0310-9dd1-cebe43e6787f
fpvectorial: svg: Adds numbers as bold too

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44396 4005530d-fff6-0310-9dd1-cebe43e6787f