DEV-44564 'speak' button PTT-toggles and displays voice monitor even when voice disabled, gives wrong impression that you should be able to talk

Autopopulation logic is now smarter and only triggers if this is the first time you're logging into viewer2.0.

Tracking a "Is this my first time in viewer2.0?" flag and only populating My Outfits folder if it's true.

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The help_topic tags for Preferences, About Land, and Advanced Water
Editor were removed for EXT-2766. However, this has the sideeffect
that those floaters no longer show the "?" Help button. So, I'm
reverting that change and putting these help IDs back again.

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Work on normal bug EXT-3434 	There is no difference between invited and left participants in a Group call (Voice Controls)
-- implemented decorating of left participants in voice chat via italic font style (draft, harcoded)

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- manually set rect for a chiclet in the IM Well Window

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Name change "DontShowInHierarchy"->"Hidden".

Additional commit for EXT-3581: the code of updating of speakers order is moved to a separate method

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Took out CONTROL+SHIFT+I for bringing up test inspectors, per Erica request.

Liana and the search team want the minimum size of the search floater
to be such that the web content appears at 650x600 pixels. Users can
resize the window larger, but not smaller, than this limit.

When we close the Pick panel, we now also close any specific
classified or pick that was opened from the pick panel.

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If the user enters a string into the navigation bar that is not
recognized as an SL location, the behavior is now:

- handle any secondlife:// SLapps, or
- open any http: or https: URLs in the media browser, or
- otherwise, send the text to the search floater

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 -- set "new messages" state only if count of unread messages is increased.

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additional commit to major task EXT-3509   	 User's own name should appear in the Group chat participant list
1. agent will be appear in ad-hoc conference too.
2. Disabling block/unblock yourself.

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The "My Appearance" floater now has the following new help IDs, to
provide more granular help feedback:

customize_shape_tab
customize_skin_tab
customize_hair_tab
customize_eyes_tab
customize_shirt_tab
customize_pants_tab
customize_shoes_tab
customize_socks_tab
customize_jacket_tab
customize_gloves_tab
customize_undershirt_tab
customize_underpants_tab
customize_skirt_tab
customize_alpha_tab
customize_tattoo_tab

is opened”,
made transient floaters visible if clicked any context menu;

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This caused lots of fallout, like menu accelerators appearing as
"missing_string(accel-win-ctrl)" instead of "Ctrl+". The offending
line was the ATTACH_HUD_CENTER_2 string, which had a messed up XML
close tag.

this is extra and useless callback since setFlyingMode will be called from OnStopFlyingButtonClick.

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fix for low  Task EXT-2881 Enough space to place 5 chiclets without arrows in bottom bar when voice indicator isn't shown
change whole chicklet arranging.

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Added "Group Call" verb button to the group list so that you can start a call without opening group chat first (EXT-3596).

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implemented minor task EXT-3455 Code Improvements: Improve LLAvatarListItem not to calculate constant values in each constructing

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reviewed by Mani

* Changed download rate update frequency
* Updated network bandwidth preferences to be 100 Kbps - 10 Mbps instead of 50 Kbps - 1.5 MBps

* Important fix in lltexturefetch.cpp where a 'partial' resonse was incorrectly setting mHaveAllData.