Make use of CmdlineLeave autocmd

[mMontu]

With the CmdlineLeave available on Vim 8.1 the command-line can be made a first-class citizen on capslock plugin.

Despite I made an habit of disabling it when I leave the command-line, it'd be good to have it disabled automatically, just as in insert mode.

I'm wondering if there is an appropriated way to give an indication (similar to the one in status-line for insert mode). I thought about inserting a tag on the end or beginning of the line, and using a mapping on Enter to remove it, but that would break some functions, such as autocomplete (c_CTRL-D).