First run of the launcher doesn't save viewing distance as the default value

To do this, just run the OpenMW wizard for the first time (for this test make sure the OpenMW folder in My Games is backed-up/renamed before trying).

Note, it logs that it saved as:

[V] Created new setting section: Camera
[V] Added new setting: [Camera] viewing distance = 7208

A bug with 0.48 too.