graflow: improved test pages

graflow_examples/test4.html

@@ -83,11 +83,8 @@
                 const el = document.querySelector('.container')
                 let timer = null // debounce
                 const ro = new ResizeObserver(([entry]) => {
-                    clearTimeout(timer)
-                    timer = setTimeout(() => {
                     const grfl = entry.target.querySelector('bz-graflow')
                     grfl.autofit()
-                    }, 200)
                 })
                 
                 ro.observe(el)