css file load later than SVG files (lazy loading issue) after upgrade to 7.3

After upgrade to 7.3, it seems the css file is loaded later than the svg files:

It will works well again after I restore to V7.2

And below is the correct one running with 7.2

Also I checked the front-end code, it seems there are some logics of lazy loading changed, there is no inline JS code like below any more:
```html

...
function n(){console.log("[LiteSpeed] Start Lazy Load Images"),d=new LazyLoad({elements_selector:"[data-lazyloaded]",callback_finish:a}),o=function(){d.update()},e.MutationObserver&&new MutationObserver(o).observe(t.documentElement,{childList:!0,subtree:!0,attributes:!0})}var d,o;e.addEventListener?e.addEventListener("load",n,!1):e.attachEvent("onload",n)}(window,document);
```

No source file or test is named. Start by comparing the 7.3 lazy-loading path with 7.2, using the reported CSS/SVG load order and the removed inline LazyLoad script as entry points; done means CSS loads in the expected order and the behavior matches the working 7.2 result.

Written by the indexing model from the issue text.