- Fixed according to Steeltoe notes.
- Add const modifier for some methods

SL-10176  - [Love Me Render] MacOS Quit / Shutdown crash

Approved-by: Andrey Lihatskiy <andreylproductengine@lindenlab.com>

- Implemented

SL-10019 - [Mac] [Render] Right-click context menu immediately disappears when clicking any place in the ‘Inventory’ floater
SL-9984 - [Retina] Camera frustum, do not display correctly on "WORLD MAP" window.
SL-10027 - [Mac] [Render] Add toggle for Retina support to mitigate FPS loss

Re-FIX for Retina support.

SL-10019 - [Mac] [Render] Right-click context menu immediately disappears when clicking any place in the ‘Inventory’ floater

SL-10005

Approved-by: Andrey Lihatskiy <andreylproductengine@lindenlab.com>

Make set of copied bits (depth and/or stencil) match those present in the source and dest.

May avoid driver crash on Intel HD graphics.

FIX #2