List of steps to reproduce (step by step, including full links if applicable):

• I accidently had capslock on because I was playing a game that has a key mapping before
• I tried to log in several times in the login screen without noticing
• only when I did the captcha did I notice that I had a capslock on

What happens?:
It doesn't give a pop up that lets me know I am probably making a mistake

What should have happened instead?:
There should be a little prompt if its detecting all caps and the account is logging in that says something like "Did you know you have CapsLock on?"

Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc: NA