Permanent Serverside Reticle

- Updated for 8.6
- Added option for removing or resizing scope shadow area in avatar_input_handler.xml file.
  <resizeViewport>true</resizeViewport> : if true, resize the viewport
  <viewportSize>1.0 1.0</viewportSize> : size of viewport. 1.0 for removing scope shadow, 0.6 or 0.7 for default viewport.