Minor checks and fixes

src/assetmanager/AssetImporter.ts

         const isData = path.startsWith('data:') || false
         if (!isData) path = path.replace(/\?.*$/, '') // remove query string
 
-        const ext = isData ? undefined : file?.ext ?? parseFileExtension(file?.name ?? path)?.toLowerCase()
+        const ext = isData ? undefined : file?.ext ?? parseFileExtension(file?.name ?? path.trim())?.toLowerCase()
         const mime = file?.mime ?? isData ? path.slice(0, path.indexOf(';')).split(':')[1] || undefined : undefined
 
         if (file) {
     // get a loader that can load a file.
     private _getLoader(name?:string, ext?:string, mime?: string): ILoader | undefined {
         if (!ext && !mime && name) ext = parseFileExtension(name).toLowerCase()
-        mime = mime?.toLowerCase()
-        ext = ext?.toLowerCase()
-        return (name ? this._loadingManager.getHandler(name) as ILoader : undefined)
+        mime = mime?.toLowerCase().trim()
+        ext = ext?.toLowerCase().trim()
+        return (name ? this._loadingManager.getHandler(name.trim()) as ILoader : undefined)
             || this._loaderCache.find((lc)=> ext && lc.ext.includes(ext) || mime && lc.mime.includes(mime))?.loader
     }
 

src/core/material/PhysicalMaterial.ts

         expanded: true,
         onChange: (ev)=>{
             if (!ev.config || ev.config.onChange) return
+            // todo frameFade
             // todo set needsUpdate true only for properties that require it like maps.
             this.setDirty({uiChangeEvent: ev, needsUpdate: !!ev.last, refreshUi: !!ev.last})
         },

src/core/object/RootScene.ts

             return imported as T&IObject3D
         }
         this._addObject3D(<IObject3D>imported, options)
-        this.dispatchEvent({type: 'addSceneObject', object: <IObject3D>imported})
+        this.dispatchEvent({type: 'addSceneObject', object: <IObject3D>imported, options})
         return imported as T&IObject3D
     }
 

src/plugins/material/ClearcoatTintPlugin.ts

         if (tf.tintColor === undefined) tf.tintColor = '#ffffff'
         if (tf.thickness === undefined) tf.thickness = 0.1
         if (tf.ior === undefined) tf.ior = 1.5
-        Object.assign(tf, params)
+        params && Object.assign(tf, params)
         if (material.setDirty) material.setDirty()
         return tf
     }

src/plugins/material/FragmentClippingExtensionPlugin.ts

         if (tf.clipParams === undefined) tf.clipParams = [0, 0, 0, 0]
         if (tf.clipMode === undefined !== undefined) tf.clipMode = FragmentClippingMode.Circle
         if (tf.clipInvert === undefined !== undefined) tf.clipInvert = false
-        Object.assign(tf, params)
+        params && Object.assign(tf, params)
         if (material.setDirty) material.setDirty()
         return true
     }

src/plugins/material/NoiseBumpMaterialPlugin.ts

         if (tf.useColorFlakes === undefined) tf.useColorFlakes = false
         if (tf.flakeParams === undefined) tf.flakeParams = new Vector4(0, 1, 3, 0)
         if (tf.flakeFallOffParams === undefined) tf.flakeFallOffParams = new Vector3(0, 1, 0)
-        Object.assign(tf, params)
+        params && Object.assign(tf, params)
         if (material.setDirty) material.setDirty()
         return true
     }

src/plugins/postprocessing/AScreenPassExtensionPlugin.ts

     }
 
     private _onPluginAdd = (e: IViewerEvent)=>{
-        if (e.plugin?.constructor?.PluginType !== 'GBuffer') return
+        if (e.plugin?.constructor?.PluginType !== GBufferPlugin.PluginType) return
         const gbuffer = e.plugin as GBufferPlugin
         gbuffer.registerGBufferUpdater(this.constructor.PluginType, this.updateGBufferFlags.bind(this))
         this._viewer?.removeEventListener('addPlugin', this._onPluginAdd)