web: Indicate when caps-lock is active during password input. (#12733)
Determining the state of the caps-lock key can be tricky as we're
dependant on a user-provided input to set a value. Thus, our initial
state defaults to not display any warning until the first keystroke.
- Revise to better use lit-html.
Co-authored-by: Teffen Ellis <592134+GirlBossRush@users.noreply.github.com>
