Improve onDataChanged method (#16472)

* 🐛 Improve onDataChanged method

fix https://github.com/siyuan-note/siyuan/pull/16244

重构、修复插件重启逻辑

重构

比如插件在 onload() 中插入了图标，uninstall 会把图标删除，afterLoadPlugin 又不能执行 onload() 把图标加回来

使用 getElementById

先加载插件样式

避免插入重复的样式

改进插件样式插入位置

* reloadPlugin

app/src/window/index.ts

@@ -22,7 +22,7 @@ import {
 import {initMessage} from "../dialog/message";
 import {getAllTabs} from "../layout/getAll";
 import {getLocalStorage} from "../protyle/util/compatibility";
-import {init} from "../window/init";
+import {init} from "./init";
 import {loadPlugins, reloadPlugin} from "../plugin/loader";
 import {hideAllElements} from "../protyle/ui/hideElements";
 import {reloadEmoji} from "../emoji";