Comment 2 for bug 1460422

Tested on Windows XP, Inkscape trunk rev. 14206.
Very nice improvements!

Some comments:
1. Depending on the settings, a text can be truncated or hidden. Example: with Length, Text on Path, position to Start, anchor to Center (truncated) or Right (hidden) .
2. Since we already have a function to calculate the center of mass, maybe we could use it as an option to position fixed text.
3. The custom position option fails with the following error:
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File "measure.py", line 231, in effect
    startOffset = '{}%'.format(self.options.startOffsetCustom)
ValueError: zero length field name in format
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