1.6.3a tiny update (Windows-only) — Keysight Steam update #396068

Hello! I got my hands on some new performance testing utilities and ended up making a couple changes, wanted to push it as a build so everyone benefits. 1.6.3a (Windows-only) contains the following changes: --- SMALL ADDITIONS --- Added a "Disable frame-smoothing optimisations" toggle to Graphics > Framerate. This applies "RHI.MaximumFrameLatency 0" and "RHI.SyncSlackMS 10" in the event that the new default behaviour of "RHI.MaximumFrameLatency 1" "RHI.SyncSlackMS 0" somehow causes issues for anyone. --- CHANGES --- Changed Pulses to switch to mask-capable mode only when Mask Mode is enabled, and allowed this to happen for sprite and world-space opacity masked Pulses Changed default engine CVars to "RHI.MaximumFrameLatency 1" "RHI.SyncSlackMS 0" to add in smoother frame delivery when v-sync'd and operating comfortably within hardware capabilities. This is measurable, but minor --- BUG FI...