OS version string reports compatibility mode and real os version number, if accessible.
reviewed by Richard

I hope.

undo the changes for LLStyle params; add sizeFromFont in LLFontGL ; use font.style, font.name and font.size params for font creating

Apparently some name lists have placeholder items at the top, so don't show
the inspector icon unless there is a valid UUID.

EXT-2537 Update IM message well arrows with actual art, style chiclets to spec, EXT-2536 Remove old art from scrollbar headers, clean up layout

Note: This was fixed earlier in checkTitle() bosy and checked in by mistake.
This checkin re-enables the title grabbing code.

reviewed by Palmer

Reinstated the hide_loading parameter to LLMediaCtrl, and made it cause LLMediaCtrl::draw() to early-exit between creating the LLViewerMediaImpl and receiving the initial MEDIA_EVENT_NAVIGATE_COMPLETE.

When the MediaPerformanceManagerDebug debug setting is enabled, the list will sort by priority the way it used to.

Fixed by implementing DEV-41250 and integrating merov's DEV-31329 "curl crashers"
work into viewer-2-0.

EXT-2529 Fixed viewer_manifest.py to check secondlife-bin.exe for bad manifest linking. Reviewed by Palmer.