add a property for keeping the font-size fixed on svg files while resizing it
I would love to have a property fontresize: boolean like
text: 'Highcharts Header',
for all Texts at the charts or may be also on generall property which works on all texts.
This property (set on false) should avoid that while resizing the svg-file the size of the text is being resized too.
I am not sure I understand what you mean. Consider http://jsfiddle.net/p49ob603/. When you resize that chart (by dragging the splitter in the middle of jsFiddle), the chart resizes, but the text size is constant at its given pixel value.
Do you mean it should be fixed relative to the chart size? Maybe you want to use a relative font size unit? http://jsfiddle.net/yjrzdpn4/