Cursor blink config

a-Shell is undoubtably amazing, though significant issues exists.

Using config -c and -k, I can set color and shape of the cursor. I prefer the 'block' shape of the cursor, that makes my cursor clear and easy to track, especially when the 'double cursor' issue isn't solved.

However, I did not find a config option for **cursor blink**. A non-blinking cursor in block shape covers the current character, annoying in most circumstances.

I can set cursor blink using js code `window.term_.setCursorBlink(true);`, but unfortunately window settings are executed after `.bashrc` and `.profile` been called. Manual call is required for setting cursor blink.

There should be a config option for **cursor blink**.

Thanks again for making such an useful tool. First time writing this kind of issue so my apology for any improper expression.