Enable vector export of axis labels specified in MathText form in line chart views
Currently (as of version 4.1), when exporting line chart views in vector form, the mathtext axis labels get output in plain form such as $\gamma$ instead of the Greek gamma symbol. Mathtext apperaing elsewhere, such as legends, gets output correctly. Only the axes labels do not get output correctly. I have tested it with both "renedr text as paths" checked and unchecked and the error was not affected by it.