tooltip_align (and other) with multipe charts

[fglueck]

At first, great feature!

I generate 3 charts and fetch them with: $graph->fetch(..., false, true);
After this I output the JS with: Goat1000\SVGGraph\SVGGraph::fetchJavascript();

The first charts are configured with
'tooltip_align' => 'left',

the last one with:
'tooltip_align' => 'center',

but, on screen, all are left, so only the first config will be consider.
After looking in tooltip.txt, I think this problem will be apply with other settings, too.

[goat1000]

This wasn't a problem when you had to use <object> or <embed> to add SVG to a page because each graph would contain its own Javascript, but with SVG inside the HTML now it does mean that the graphs have to share settings.

I'll add it to my list of things to think about, but it will require quite a lot of rewriting.

Edit: you can still use <object>, <embed> and <iframe> to use different settings, but it obviously isn't ideal.