Add setting to force retype of entire word on mistake

[Blake-LeBlanc]

When learning a keyboard layout, if a mistake is made, it can be useful to repeat the entire word to help engrain the full key sequence. Currently the user is only allowed to go back to the mistyped letter.

For example, let's say the word is mistake. The user types miseae then realizes his error. Currently, he can only backspace the cursor to after the s, like mis|.

It would be useful if there were options to:

• let the entire word to be manually backspaced over
• count the entire word as wrong and automatically triggered a full reset all the way back to the start of the word

Thoughts? Improvements?