give text its own dimension function

[asturur]

closes #2991

[asturur]

That is a plus in text svg import accuracy also:

SVG:

<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 14.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 43363)  -->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
     width="396px" height="162px" viewBox="0 0 396 162" enable-background="new 0 0 396 162" xml:space="preserve">
<text y="40" fill="#FF00FF" stroke="#00FF00" stroke-width="2" font-size="40">PBIS Winter Bash Dance</text>
<text x="1" y="80" fill="#FF00FF" stroke="#00FF00" stroke-width="2" font-size="40">PBIS Winter Bash Dance</text>
<text x="1" y="120" fill="#FF00FF" stroke="#00FF00" stroke-width="6" font-size="40">PBIS Winter Bash Dance</text>
</svg>

new import

svg content in browser:

actual 1.6.2 rendering:

[asturur]

@plainview nice find! thanks.