[Paraview] Labels using mathtext notation

[Hahn, Steven E.]

Hi,

I am trying to generate a plot using ParaView v5.0.0-RC1 where the axes
contain mathtext labels. If the label is 2 or more characters long, then
everything is OK. If my label is one character only, it plots the $ signs.

Here is a simple way to reproduce this issue:
- Use a sphere source.
- Show the axes
- Edit axes grid
- At the end of X Title string add ³$x$²
- At the end of Y Title string add ³$yy$²

The X axis title is ³X Axis $x$². The Y axis title is ³Y Axis yy² where yy
is italic.

Best,
Steven Hahn