fix(ngx-table): make the sorting table header cell a button to improve accessibility#250

WHeirstrate merged 1 commit intomasterstudiohyperdrive/hyperdrive-opensource:masterfrom

fix/ngx-table/wcag-table-header-compliancystudiohyperdrive/hyperdrive-opensource:fix/ngx-table/wcag-table-header-compliancyCopy head branch name to clipboard