Incoming changes from two different project repos left viewer-development with
LLInventoryModel::removeItem() and removeCategory() plus free functions
remove_item() and remove_category() in llinventoryfunctions.cpp.
remove_category() was actually the better implementation; migrated its body
into LLInventoryModel::removeCategory(). Clearly the previous state of affairs
-- with LLInventoryModel::removeItem() plus a remove_category() free function
in a very different source file -- fooled two different developers into
overlooking the other of the pair. Unfortunately we each added different
"missing" functions, leaving us with a complete set of four.
Fix existing references to remove_item() and remove_category() free functions.

LL_PATH_USER_SETTINGS. This will allow a common write location for development
and installed configurations. Should correct installed configuration from
permission failures on windows systems where writing to the install directory
requires elevation of rights to administrator.

Subtask of STORM-637

Introduce new LLInventoryModel::removeCategory() method comparable to
removeItem(), but for folder objects (using changeCategoryParent() rather than
changeItemParent()). Introduce removeObject() method that calls one of the
above, depending on runtime object type.

The body of removeItem() was already nearly identical to the body of
changeItemParent(); this eliminates the redundancy.
Improve logging for changeItemParent().

It's not really clear why they're in llinventoryfunctions.{h,cpp} instead of
LLInventoryModel, and in fact LLInventoryModel::removeItem() already contains
code essentially cloned from change_item_parent() -- or perhaps vice-versa.
This changeset addresses only migrating the functions, and fixing up existing
references, to simplify code review.

STORM-1828  Set to proper jira issue. Intermittent write to character/new archetype.xml from Develop->Avatar->
Character Tests->Apperance To XML. Add explicit outfile.close() method
before returning to caller. Add llinfos for file location as a troubleshooting
aid.

Character Tests->Apperance To XML. Add explicit outfile.close() method
before returning to caller. Add llinfos for file location as a troubleshooting
aid.

potential fix by not changing mostfiltereddescendant flag when dirtying folder as new
contents arrive

CHUI-70 FIX Build floater and other floaters opened in default position become centered in viewer when object is built or viewer resized
always initialize mPosition