Reviewed by Bao

Added gInventory.notifyObservers to idle callbacks so it gets triggered without explicit notifyObservers synchronization.
Added more state tracking for attachments, wearables, and links of those types, so that they're marked as changed properly.

created a throwaway function to temporarily set local texture IDs in the avatar
object to IMG_DEFAULT_AVATAR immediately before sending the TE message, and
restore the IDs when we're done. Will implement a more elegant solution for 2.1.
This is the least risky implementation, though it isn't elegant.

Code reviewed by Seraph

- Added vertical scroll appearing for Place Profile and Landmark info panels.
- Added horizontal reshaping to avoid redundant horizontal scroll.

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branch : product-engine

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branch : product-engine

implemented normal task EXT-2519 Share button in IM should put 'Drag items from inventory here' in IM window

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branch : product-engine

removed commented code from XML file
removed from toast notify panel Icon member and a corresponding code

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branch : product-engine

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branch : product-engine

Fixed normal priority bug EXT-2606 (Stand/Stop Flying btn disappear if movement floater looses focus).

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branch : product-engine

Fixed major bug EXT-2532-IM timestamp is when message is viewed, not when it was sent and received. Time str from the arriving message used now instead of constructing it dynamicly.

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branch : product-engine

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branch : product-engine

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branch : product-engine

Particial fix for normal bug EXT-2410- Accepting an Offered Notecard Should Open the Side Bar Inventory Tab. Added select command while opening inventory sidetray panel

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branch : product-engine

overlaps next item in list).

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branch : product-engine

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branch : product-engine

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branch : product-engine

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branch : product-engine

to access deleted LLSearchHistory singleton when exiting from viewer).

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branch : product-engine

 - implemented counter next to the left from an envelope icon.
 - button now has fixed width for 3 digits.

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branch : product-engine

avoid undock floater when resize initiated not by user

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branch : product-engine

llkdu.dll was referenced via "configuration", but sharedlibs prefix already included "configuration"

Sorting was fixed when LLFolderViewFolder was added back into the inventory panels.  This checkin additionally allows sorting in the landmarks inventory panel.

Removed unnecessary headers from llinventorybridge.cpp.

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branch : avatar-pipeline

For some reason, we started using the baseobj's permissions instead of the link's permissions at some point.  Reverting it back to using the link's permissions.

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branch : avatar-pipeline

Changed FT_CATEGORY -> FT_ROOT_INVENTORY
Removed AT_ROOT_CATEGORY

This parallels llasset cleanup work done on viewer-side for removing the unused AT_ROOT_CATEGORY type, and for making it more clear that a folder of type FT_CATEGORY (now FT_ROOT_INVENTORY) is your "My Inventory" folder.