Minor improvements

Model/Player/Backends/MPVBackend.swift

@@ -152,6 +152,10 @@ final class MPVBackend: PlayerBackend {
         isPlaying = true
         startClientUpdates()
 
+        if controls.presentingControls {
+            startControlsUpdates()
+        }
+
         client?.play()
     }
 
@@ -305,4 +309,8 @@ final class MPVBackend: PlayerBackend {
     func setNeedsDrawing(_ needsDrawing: Bool) {
         client?.setNeedsDrawing(needsDrawing)
     }
+
+    func setSize(_ width: Double, _ height: Double) {
+        self.client?.setSize(width, height)
+    }
 }