图标闪烁设置、会话保存-导入导出

问题：
v：2.2.2
env：window 11 22000.376
插入图标设置竖线、闪烁 关闭后再打开不生效 还是默认块
期望需求：
创建的会话可以导入导出，类似xshell\MobaXterm等换个机器直接导入就可以使用
之前用2.1创建连接，升级2.2还得一个个重新创建(也可能功能有，但是我没找到怎么导入导出)

会话最好显示到界面，如图


The issue names no files, tests, or entry points. Start by locating the settings persistence and session-management UI, then verify that the cursor setting survives reopening and define the requested session import/export and visible-session behavior; completion requires addressing all requested parts.

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