Drawcall timings now mostly supported

ReleaseNotes.md

@@ -31,6 +31,7 @@ Known Issues
 
 * Memory/image barriers are as yet unverified, potentially could lead to bad capture or replay.
 * Sparse images with mips or array slices will not properly replay
+* Drawcall timings may be unreliable, and are also top-to-bottom of pipe each, so don't sum up accurately.
 
 Future work, post 1.0
 ========
@@ -45,7 +46,6 @@ In no particular order, features that are not planned until after 1.0.
 * Mesh output data after geometry and tessellation shaders
 * Vertex picking
 * Pixel history
-* Drawcall timings
 * Custom visualisation shaders
 * Linux support with Qt UI
 * Shader edit & replace