Custom role set name is not show in the New Project wizard

[dbarashev]

1. Edit ~/.ganttproject file and add a new role set:

<roles roleset-name="Default">
    <role id="0" name="undefined"/>
    <role id="1" name="project manager"/>
</roles>
<roles roleset-name="SoftwareDevelopment">
    <role id="2" name="developer"/>
    <role id="3" name="doc writer&#9;"/>
    <role id="4" name="tester"/>
    <role id="5" name="graphic designer"/>
    <role id="6" name="doc translator"/>
    <role id="7" name="packager (.rpm, .tgz, ...)"/>
    <role id="8" name="analysis"/>
    <role id="9" name="web designer"/>
    <role id="10" name="no specific role"/>
</roles>
<roles roleset-name="Project">
    <role id="11" name="optical design"/>
    <role id="12" name="optical assembly"/>
    <role id="13" name="mechanical design"/>
    <role id="14" name="mechanical assembly"/>
    <role id="15" name="electronic design"/>
    <role id="16" name="software developer"/>
    <role id="17" name="technical writer"/>
    <role id="18" name="purchasing"/>
</roles>

2. Start GanttProject and open Project > New

Expected: the new role set is visible in the wizard with its name. Actual: the role set appears, but there is no name label next to the checkbox.