message: Don't display window cycling message on platforms without keyboard input
diff: @@ -975,6 +975,8 @@ rdcstr RenderDoc::GetOverlayText(RDCDriver driver, uint32_t frameNumber, int fla
  m_WindowFrameCapturers.size());
  }
  + if(Keyboard::PlatformHasKeyInput())
  + {
  for(size_t i = 0; i < keys.size(); i++)
  {
  if(i == 0)
  @@ -987,6 +989,7 @@ rdcstr RenderDoc::GetOverlayText(RDCDriver driver, uint32_t frameNumber, int fla
  if(!keys.empty())
  overlayText += " to cycle between windows";
  + }
  overlayText += "\n";
  }
  