The button shortcode does not support a link title yet but I'll ask Kriesi to look into it. For now you can add this feature with a small code customization. Open up upscale\includes\admin\register-shortcodes.php and replace following code:
extract(shortcode_atts(array( 'size' => '',
'style' => '',
'color' => '',
'border' => '',
'text' => '',
'class' => '',
'link' => '#',
'window' => ''), $atts));
with:
extract(shortcode_atts(array( 'size' => '',
'style' => '',
'color' => '',
'border' => '',
'text' => '',
'class' => '',
'link' => '#',
'title' => '';
'window' => ''), $atts));
and:
// Open in new window?
if ( $window ) $window = 'target="_blank" ';
with:
// Open in new window?
if ( $window ) $window = 'target="_blank" ';
// Link title
if ( $title ) $title = ' title="'.$title.'" ';
and
$output = '<a '.$window.'href="'.$link.'" class="avia-button '.$class_output.'" '.$color_output.'><span class="avia-'.$style.'">' .
with:
$output = '<a '.$title.$window.'href="'.$link.'" class="avia-button '.$class_output.'" '.$color_output.'><span class="avia-'.$style.'">' .