Support highlight for CtrlP with devicons

[phongnh]

Hi,

When I use CtrlP with devicons, cpsm's regex highlight does not work. Tried to add regex to support both cases with and without Devicons at beginging of each line.

Here is my test case:

>  zero/nvim/plugins/ctrlp.lua
> zero/nvim/plugins/ctrlp.lua
>  zero/vim/plugins/ctrlp.vim

call matchadd('CtrlPMatch', '\V\C\^> \%\(\.\+\s\+\)\?zero/nvim/plugins/\zsctrlp\ze.lua\$')

I think this will make matching slow down a bit. Please merge it if you think it does make senses, thanks.

[nixprime]

Thanks for the contribution!