Wrong sorting mode when started in fullscreen.

[dee]

Steps to reproduce:

1. set sort mode to "Name"
2. quit XnView
3. start XnView in fullscreen mode
4. use pgup/pgdown to see how images are sorted

Expected:
sorted by "Name"

Actual:
sorted by "Name (numeric)"

Notes:
- other sorting modes work well
- after switching to browser, sorting changes to correct one
- testing XnView 2.35 in Win7 x64