[Fix] Fix the shader linking after the lost context has been restored.

src/platform/graphics/webgl/webgl-graphics-device.js

@@ -1360,7 +1360,7 @@ class WebglGraphicsDevice extends GraphicsDevice {
         this.initializeRenderState();
         this.initializeContextCaches();
 
-        // Recompile all shaders (they'll be linked when they're next actually used)
+        // Recompile all shaders
         for (const shader of this.shaders) {
             shader.restoreContext();
         }

src/platform/graphics/webgl/webgl-shader.js

@@ -96,6 +96,7 @@ class WebglShader {
      */
     restoreContext(device, shader) {
         this.compile(device, shader);
+        this.link(device, shader);
     }
 
     /**

src/scene/skybox/sky-mesh.js

@@ -31,6 +31,7 @@ class SkyMesh {
     constructor(device, scene, node, texture, type) {
 
         const material = new Material();
+        material.name = 'SkyMaterial';
 
         material.getShaderVariant = function (dev, sc, defs, unused, pass, sortedLights, viewUniformFormat, viewBindGroupFormat) {