Vaadin-grid header camelCase

Hello,

I'm using Vaadin-Grid (Polymer/JS version from the vaadin elements).
I'm setting the columns name through:

grid.columns = [
    {name: "FX Rate", sortable: true},
    {name: "Currency in USD", sortable: true},
...]

The column name is displayed but wrongly formatted:
- Instead of having "FX Rate", I'll have: "F X Rate"- Instead of having "Currency in USD", I'll have: "Currency in US D"
White space are inserted after two consecutive capitalized letters.

Is it possible to disable or to force the caption not being formatted to humain readable/camelCase ?

PS: I saw that it is possible to use HTML thead>tr>th but I would like to avoid this solution.

Best regards,
Yves