Issue with TTMSWEBStyles and CSS import rules

If the CSS file referred to by TTMSWEBStyles.CSSStyleFileName contains import rules, the class function FindCSSStyleRule will fail.

I therefore suggest to add
if (classes[x].selectorText !== undefined) {
before
if (classes[x].selectorText.startsWith(s))

FNC Core's TTMSFNCStyles and VCL UI Pack's AdvGraphicsStyles have the same issue.

Thanks for reporting. We will investigate and apply the improvements.