Fix auto complete and clear terminal

[xmow49]

Hello,

I found a bug when using the auto-complete feature:
If no result is found, the auto-complete returns directly:

    if (cmplt_tkn_arr[0] == NULL) {
        return microrlERRCPLT;
    }

So after the return, the command no longer works because the command string is still separated by 0.

I added the whitespace conversion again before the return.
Now, if no result is found, the command is not edited.

I also fixed the clear function with an argument to specify if we want to clear the current command.

Thanks

commit:

• fix: auto-complete restore whitespaces on error
• fix: terminal clear with a reset argument

[xmow49]

Hi,
Just following up, have you had a chance to review this PR?

Thanks