EXT-7631 FIXED Bad location of Empty Lost and Found option will lead to Critical Inventory loss by Residents

Switched location of Lost&Found versus EmptyTrash items.

EXT-7631 FIXED Bad location of Empty Lost and Found option will lead to Critical Inventory loss by Residents

Separated Lost&Found from EmptyTrash as specified in EXT design decision.

Going through and cleaning up any todos that have "Seraph" attached to it.  In this case, did some header file cleanup of llinventorymodelbackgroundfetch and moved some functions protected/const/etc.

Reduced LowResTextures timeout from 3 to 2 minutes.

Also removes some redundant code, and registers UI callbacks for use from XUI.

Reviewed by: Tofu

Fix:
- Save the UUID of a newly created wearable to start editing it right after it gets worn.
  This approach replaces a temporary hack that invoked the editing panel whenever an item gets worn
  (if the Appearance SP is opened at the time).
  The hack only happened to work sometimes because the editing panel failed to open.

Other changes:
- Removed a check for inventory item completeness from LLAgentWearables::editWearable().
  because the check often fails and doesn't appear to be needed at all.
- Added warning messages to LLAgentWearables::editWearable() so that it's easier to debug.
- Replaced duplicated code in LLPanelOutfitEdit::onEditWearableClicked() with a call to gAgentWearables.editWearable().

Reviewed by Nyx at https://codereview.productengine.com/secondlife/r/529/

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EXT-7644 FIXED Implemented functionality for locking outfit modification controls and used it for 'save outfit' action.
1 Added functionality for locking outfit in LLAppearanceMgr. Outfit should be locked when outfit related operation is started(now it is used for updateBaseOutfit) and unlocked when operation completed or timeout is exceeded.
2 Added outfit saved and outfit lock changed signals to LLOutfitObserver.
3 Updated LLPanelOutfitsInventory and LLPanelOutfitEdit with functionality of controlling 'save outfit' controls state('save outfit' controls should be enabled only if outfit isn't locked and outfit is dirty).
4 Renamed action label of method LLPanelOutfitsInventory::isActionEnabled "make_outfit" to "save_outfit".

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EXT-7503 WIP Improved LLInventoryModel::updateItem to avoid an extra calls of notifyObservers while updating calling card item.

 - added check on whether avatar name exists in Name Cache before using its getter with callback (which raises notifyObservers).

Reviewed by Brad Payne at https://codereview.productengine.com/secondlife/r/526/

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reviewed by Mani

reviewed by erica

Fixed llinfos debug line to give more useful information.

Fixed an error in logic - low res textures should be identified by uploadNeeded versus uploadPending.
Also added a llinfos debugging line.

Backed out changeset e6feef9704cf to re-introduce Bao's fix

EXT-7443 FIXED Speak button's layout updated - Reduced right padding by 2 px in main locale, remove horizontal align in 'de' locale.

For now all locales have the same center aligning with right padding to ignore space under indicator.

Reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/519/

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Upgrade Darwin libcurl to 7.20.1 and ares to 1.7.1

Reviewed by Mike Antipov at https://codereview.productengine.com/secondlife/r/520

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This patch follows (23f0f13abc8b) and prevent to show two messages about empty Friends list.

Reviewed by Vadim Savchuk.

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reviewed by Richard Nelson at https://codereview.productengine.com/secondlife/r/516/

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