SH-4222 FIX, SH-3635 WIP - start of stuck-appearance checker, always increment folder version when a contained item is updated.

SH-4207 WIP - use item updates with callback when updating link descriptions. Reworked updateAppearanceFromCOF() cof-validation stages.

cleaned up logic for displaying "loading..." message so that it
only applies to folders that are opened whose contents aren't
yet loaded

SH-4175 WIP - removed a case where we request to delete the base outfit link twice when changing outfits

SH-4175 WIP - Avoid add to outfit or remove from outfit when an outfit change is already in progress

SH-4197 FIX - also simplified the category remove flow for AIS, don't need to purge descendents first.

SH-4168 WIP, SH-4155 WIP - update inventory model based on ais returns, try to maintain loading... string more consistently in folder bridge

SH-4035: Hooked up logic to handle 'me->appearance'. Refactored out some commonly used code in llfloatersidepanelcontainer

SH-4035: Removed prompt to save if av just has outfit changes. Hooked up logic to handle ctrl+w and ctrl+shift+w confirmation prompts

usually disabled, enable avatar in logcontrol.xml to get output.

SH-4176 WIP - allow retries on 4xx errors if enabled by flag. So enable in the case of appearance requests.