ID 308171 - Change Hiero's "save as" dialogue box to default to .hrox instead of .nk when Hiero cannot locate a license

Problem summary
Hiero's "save as" dialog box defaults to .nk instead of .hrox

Customer reported version

Customer reported platform
n_a_mac

Steps to reproduce

1) Launch Hiero with the computer connected to a network license.

2) Unplug the network cable/disable wifi

3) Hiero dialogue box will appear asking to save project as .nk instead of .hrox

Workaround
Save file manually as .hrox

Reproduced by support
Hiero 11.0v2 - MacOS 10.12 - Linux CentOS 6.9 - Windows 7
Hiero 11.0v1 - MacOS 10.12 - Linux CentOS 6.9 - Windows 7
Hiero 10.5v5 - MacOS 10.12 - Linux CentOS 6.9 - Windows 7
Hiero 10.5v1 - MacOS 10.12 - Linux CentOS 6.9 - Windows 7
Hiero 10.0v6 - MacOS 10.12 - Linux CentOS 6.9 - Windows 7
Hiero 10.0v1 - MacOS 10.12 - Linux CentOS 6.9 - Windows 7