STORM-185 FIXED Don't reset accordions in the Outfit Edit panel when a wearable gets worn.

The fix consists of two parts:
1. Saving/restoring scrollbar position when refreshing the clothing/attachments/bodyparts lists
   (the lists get refreshed on COF change).
2. Not resetting expanded accordion tab upon wearing an item (which was introduced with the fix of EXT-8164).

So, apart from preserving scrollbar position (which is what the bug reporter requests),
I also fixed that when you wear something, the Clothing accordion was always expanded.